label
stringlengths 1
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stringlengths 1
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stringlengths 87
8.24k
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27
|
13000
|
int main()
{
int n;
scanf("%d",&n);
int i=1;
while(i<=n)
{
double a,b,c;
scanf("%lf %lf %lf",&a,&b,&c);
double x1,x2;
if (b*b-4*a*c>0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
if (b*b-4*a*c<0.00000001&&b*b-4*a*c>-0.00000001)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
printf("x1=x2=%.5f\n",x1);
}
if(b*b-4*a*c<-0.00000001)
{
double n,m;
n=-b/(2*a);
m=sqrt(4*a*c-b*b)/(2*a);
if(fabs(n)<0.00001)
n=0.00000;
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",n,m,n,m);
}
i=i+1;}
}
|
27
|
13001
|
int main(int argc, char* argv[])
{
int n, j;
double x1, x2, s, t, a, b, c;
scanf("%d", &n);
for(j=1;j<=n;j++)
{
scanf("%lf%lf%lf", &a, &b, &c);
if(b*b-4*a*c>0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n", x1, x2);
}
if(b*b-4*a*c==0)
{
x1=-b/(2*a);
printf("x1=x2=%.5lf\n",x1);
}
if(b*b-4*a*c<0)
{
s=-b/(2*a);
t=sqrt(4*a*c-b*b)/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n", s, t, s, t);
}
}
return 0;
}
|
27
|
13002
|
double fangcheng(double a,double b,double c)
{
double d,x1,x2,m,n;
d=b*b-4*a*c;
if(d>0)
{
x1=(-b+sqrt(d))/(2*a);
x2=(-b-sqrt(d))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else if (d==0)
{
x1=-b/(2*a);
x2=-b/(2*a);
printf("x1=x2=%.5lf\n",x1);
}
else if (d<0)
{
m=-b/(2*a);
n=sqrt(-d)/(2*a);
if(m==-0)
{
m=0;
}
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",m,n,m,n);
}
return 0;
}
int main()
{
int n;
scanf("%d",&n);
while(n>0)
{
double a,b,c;
scanf("%lf%lf%lf",&a,&b,&c);
n=n-1;
fangcheng (a,b,c);
}
return 0;
}
|
27
|
13003
|
//********************************
//*???6.cpp **
//*????????????**
//*????? 1300012844 **
//*???2013.10.9 **
//********************************
int main()
{
int n; //????????n
double x1, x2; //?????x1?x2
double a, b, c, delta; //???????a?b?c????delta
cin >> n; //??n
for ( int i = 0; i < n; i++)
{
cin >> a >> b >> c; //????a?b?c
delta = b * b - 4 * a * c; //?????delta
if ( delta > 0 ) //??delta??????????
{ //??????x1,x2????0??-0?????
x1 = 0 + ( -b + sqrt(delta) ) / ( 2 * a );
x2 = 0 + ( -b - sqrt(delta) ) / ( 2 * a );
cout <<fixed << setprecision(5);
cout << "x1=" << x1 << ";x2=" << x2 << endl; //??x1?x2
}
else if ( delta < 0 ) //??delta??????????
{
x1 = 0 + ( - b ) / (2 * a); //x1????
x2 = fabs( sqrt(-delta) / (2 * a) ); //x2????
cout << fixed << setprecision(5);
cout << "x1=" << x1 << "+" << x2 << "i;";
cout << "x2=" << x1 << "-" << x2 << "i" << endl; //??x1?x2
}
else
{
x1 = 0 + ( - b ) / (2 * a); //?????????
cout << fixed << setprecision(5);
cout << "x1=x2=" << x1 << endl; //??x1?x2
}
}
return 0;
}
|
27
|
13004
|
/*
* 004.cpp
*
* Created on: 2012-9-28
* Author: ???
* ??:???????????????
*/
int main(){
int n;
double a,b,c,delta,x1,x2,x;
cin >> n;
while(n--){
cin >> a >> b >> c;
delta=b*b-4*a*c;
if (delta>=0){ //??????
if (delta>0){
x1=(-b + sqrt(delta))/(2*a);
x2=(-b - sqrt(delta))/(2*a);
if (x1==0) x1=0; //????"-0"???
if (x2==0) x2=0;
printf("x1=%.5f;x2=%.5f\n",x1,x2); //?printf??????5???
} else {
x1=(-b)/(2*a);
if (x1==0) x1=0;
printf("x1=x2=%.5f\n", x1);
}
}else {
x1=(-b)/(2*a); //??
x=sqrt(-delta)/(2*a); //??
if (x1==0) x1=0;
if (x==0) x=0;
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",x1,x,x1,x);
}
}
return 0;
}
|
27
|
13005
|
main()
{
int n,i;
double a[99],b[99],c[99],x1,x2,d;
scanf("%d",&n);
i=1;
while(i<=n)
{
scanf("%lf %lf %lf",&a[i],&b[i],&c[i]);
i=i+1;
}
{
i=1;
while (i<=n)
{ if (b[i]!=0)
{d=b[i]*b[i]-4*a[i]*c[i];
if(d>0)
{ x1=(-b[i] + sqrt(d))/(2*a[i]);
x2=(-b[i] - sqrt(d))/(2*a[i]);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
if(d==0)
{ x1=-b[i]/(2*a[i]);
x2=-b[i]/(2*a[i]);
printf("x1=x2=%.5lf\n",x1);
}
if(d<0)
{ x1=-b[i]/(2*a[i]);
x2=sqrt(-b[i]*b[i]+4*a[i]*c[i])/(2*a[i]);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1,x2,x1,x2);
}
}
if (b[i]==0)
{
d=b[i]*b[i]-4*a[i]*c[i];
if(d>0)
{ x1=(-b[i] + sqrt(d))/(2*a[i]);
x2=(-b[i] - sqrt(d))/(2*a[i]);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
if(d==0)
{ x1=(fabs)(-b[i]/(2*a[i]));
x2=(fabs)(-b[i]/(2*a[i]));
printf("x1=x2=%.5lf\n",x1);
}
if(d<0)
{ x1=(fabs)(-b[i]/(2*a[i]));
x2=(fabs)(sqrt(-b[i]*b[i]+4*a[i]*c[i])/(2*a[i]));
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1,x2,x1,x2);
}
}
i=i+1;
}
}
}
|
27
|
13006
|
char *solve_x(int xn, float a, float b, float c)
{
double in_sqrt = b * b - 4 * a * c;
double x;
char *res;
double real, imaginary;
res = (char *)malloc(100 * sizeof(char));
if (in_sqrt >= 0) {
if (xn == 1) {
x = (-b + sqrt(in_sqrt)) / (2 * a);
} else {
x = (-b - sqrt(in_sqrt)) / (2 * a);
}
sprintf(res, "%.05f", x);
if (!strcmp(res, "-0.00000")) {
res++;
}
} else {
real = -b / (2 * a);
imaginary = sqrt(-in_sqrt) / (2 * a);
sprintf(res, "%.05f", real);
if (!strcmp(res, "-0.00000")) {
res++;
}
if (xn == 1) {
sprintf(res + strlen(res), "+%.05fi", imaginary);
} else {
sprintf(res + strlen(res), "-%.05fi", imaginary);
}
}
return res;
}
int main()
{
int n;
double a, b, c;
char *x1, *x2;
scanf("%d", &n);
while (n--) {
scanf("%lf %lf %lf", &a, &b, &c);
x1 = solve_x(1, a, b, c);
x2 = solve_x(2, a, b, c);
if (!strcmp(x1, x2)) {
printf("x1=x2=%s\n", x1);
} else {
printf("x1=%s;x2=%s\n", x1, x2);
}
}
return 0;
}
|
27
|
13007
|
int main(int argc, char* argv[])
{
int n,i;
scanf("%d",&n);
double a[100],b[100],c[100],x1[100],x2[100],y1[100];
for(i=0;i<n;i++)
{
scanf("%lf%lf%lf",&a[i],&b[i],&c[i]);
}
for(i=0;i<n;i++)
{
if(b[i]*b[i]-4*a[i]*c[i]>0)
{
x1[i]=(-b[i]+sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]);
x2[i]=(-b[i]-sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]);
printf("x1=%.5lf;x2=%.5lf\n",x1[i],x2[i]);
}
if(b[i]*b[i]-4*a[i]*c[i]==0)
{
x1[i]=x2[i]=(-b[i]+sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]);
printf("x1=x2=%.5lf\n",x1[i]);
}
if(b[i]*b[i]-4*a[i]*c[i]<0)
{
y1[i]=sqrt(-b[i]*b[i]+4*a[i]*c[i])/(2*a[i]);
x1[i]=-b[i]/(2*a[i]);
x2[i]=-b[i]/(2*a[i]);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1[i],y1[i],x2[i],y1[i]);
}
}
return 0;
}
|
27
|
13008
|
int main()
{
int i,n;
scanf("%d\n",&n);
float A[100][3];
for(i=0;i<n;i++)
scanf("%f%f%f\n",&A[i][0],&A[i][1],&A[i][2]);
for(i=0;i<n;i++)
{
if(A[i][1]*A[i][1]-4*A[i][0]*A[i][2]>0)
printf("x1=%.5f;x2=%.5f\n",(-A[i][1]+sqrt(A[i][1]*A[i][1]-4*A[i][0]*A[i][2]))/(2*A[i][0]),(-A[i][1]-sqrt(A[i][1]*A[i][1]-4*A[i][0]*A[i][2]))/(2*A[i][0]));
else if(A[i][1]*A[i][1]-4*A[i][0]*A[i][2]==0)
printf("x1=x2=%.5f\n",(-A[i][1])/(2*A[i][0]));
else if(A[i][1]*A[i][1]-4*A[i][0]*A[i][2]<0)
{if((-A[i][1])/(2*A[i][0])==0)
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",(A[i][1])/(2*A[i][0]),(sqrt(-(A[i][1]*A[i][1]-4*A[i][0]*A[i][2])))/(2*A[i][0]),(A[i][1])/(2*A[i][0]),(sqrt(-(A[i][1]*A[i][1]-4*A[i][0]*A[i][2])))/(2*A[i][0]));
else printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",(-A[i][1])/(2*A[i][0]),(sqrt(-(A[i][1]*A[i][1]-4*A[i][0]*A[i][2])))/(2*A[i][0]),(-A[i][1])/(2*A[i][0]),(sqrt(-(A[i][1]*A[i][1]-4*A[i][0]*A[i][2])))/(2*A[i][0]));}
}
return 0;
}
|
27
|
13009
|
main()
{
double f;
int n,m;
scanf("%d",&n);
float a[20],b[20],c[20];
for(m=0;m<n;m++)
{
scanf("%f %f %f",&a[m],&b[m],&c[m]);
}
int i;
for(i=0;i<n;i++)
{
f=b[i]*b[i]-4*a[i]*c[i];
if(f>=0)
{
double p,q;
p= (-b[i]+ sqrt(f))/(2*a[i]);
q = (-b[i]- sqrt(f))/(2*a[i]);
if(p==q)
printf("x1=x2=%.5f\n",p);
else
printf("x1=%.5f;x2=%.5f\n",p,q);
}
else
{
double d,e;
d=sqrt(-f)/(2*a[i]);
e=0-b[i]/(2*a[i]);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",e,d,e,d);
}
}
}
|
27
|
13010
|
int main(void)
{
double a , b , c , n , i , panbieshi , x1 , x2 , d , e;
cin >> n;
for( i = 0 ; i < n ; i++ )
{
cin >> a >> b >> c;
panbieshi = b * b - 4 * a * c;
if( panbieshi > 0 )
{
x1 = ( - b + sqrt( b * b - 4.0 * a * c ) ) / ( 2.0 * a );
x2 = ( - b - sqrt( b * b - 4.0 * a * c ) ) / ( 2.0 * a );
cout << "x1=" << fixed << setprecision(5) << x1 << ";";
cout << "x2=" << fixed << setprecision(5) << x2 << endl;
}
if( panbieshi == 0 )
{
x1 = ( - b + sqrt( b * b - 4.0 * a * c ) ) / ( 2.0 * a );
cout << "x1=x2=" << fixed << setprecision(5) << x1 << endl;
}
if( panbieshi < 0 )
{
d = ( - b ) / ( 2.0 * a );
e = sqrt( - b * b + 4.0 * a * c ) / ( 2.0 * a );
if( d == -0 )
d = 0;
cout << "x1=" << fixed << setprecision(5) << d << "+" << e << "i" << ";";
cout << "x2=" << fixed << setprecision(5) << d << "-" << e << "i" << endl;
}
}
return 0;
}
|
27
|
13011
|
main()
{
int n,i;
double a,b,c,H,p,q;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%lf %lf %lf",&a,&b,&c);
p=-b/(2*a); H=b*b-4*a*c;
if(H>1e-6) {q=sqrt(H)/(2*a);printf("x1=%.5f;x2=%.5f\n",p+q,p-q);}
else{ if(fabs(H)<=1e-6) {printf("x1=x2=%.5f\n",p);}
else{ q=sqrt(-H)/(2*a); if(p!=0) printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",p,q,p,q);
else printf("x1=0.00000+%.5fi;x2=0.00000-%.5fi\n",q,q);
}}
}
}
|
27
|
13012
|
int main()
{
float a[20],b[20],c[20];
double x1,x2,p,q,m;
int n,i;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%f %f %f",&a[i],&b[i],&c[i]);
}
for(i=0;i<n;i++)
{
double t;
t=b[i]*b[i]-4*a[i]*c[i];
if(t>0)
{
if(c[i]==0)
x1=0;
else
x1=(-b[i]+sqrt(t))/(2*a[i]);
x2=(-b[i]-sqrt(t))/(2*a[i]);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else
if(t==0)
{
if(b[i]==0)
m=0;
else
m=-(b[i]/(2*a[i]));
printf("x1=x2=%.5f\n",m);
}
else
{
if(b[i]==0)
{
p=-0.000000;
}
else
{
p=-b[i]/(2*a[i]);
}
q=sqrt(-t)/(2*a[i]);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",p,q,p,q);
}
}
return 0;
}
|
27
|
13013
|
int main()
{
int n; //n???????
cin >> n; //??n
cout << fixed <<setprecision(5);
for ( int i = 1;i <= n; i++) //??i?1?n???
{ //????
double a,b,c; //?????????a,b,c
cin >> a >> b >> c; //??a,b,c
double delta = b*b-4*a*c; //?????delta
double line = -b/(2*a); //??????-b/(2*a)
if ( line == -0 )
line = 0;
if ( delta == 0 ) //??delta?0
cout << "x1=x2=" << line << endl; //??x1=x2
else if (delta > 0)
cout << "x1=" << line + sqrt(delta)/(2*a)
<< ";x2="<< line - sqrt(delta)/(2*a)
<< endl;
else if (delta < 0)
cout << "x1=" << line << "+"
<< (sqrt(-delta))/(2*a)<< "i;"
<< "x2=" << line << "-"
<< (sqrt(-delta))/(2*a)<< "i"
<< endl;
}
cin.get();
cin.get();
return 0;
}
|
27
|
13014
|
int main()
{
int i,n;
double a[100],b[100],c[100];
cin>>n;
for(i=0;i<n;i++)
{
cin>>a[i]>>b[i]>>c[i];
}
for(i=0;i<n;i++)
{
if((b[i]*b[i]-4*a[i]*c[i])>0)
cout<<"x1="<<fixed<<setprecision(5)<<(-b[i]+sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i])<<";x2="<<fixed<<setprecision(5)<<(-b[i]-sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]);
if((b[i]*b[i]-4*a[i]*c[i])==0)
cout<<"x1=x2="<<fixed<<setprecision(5)<<-b[i]/(2*a[i]);
if((b[i]*b[i]-4*a[i]*c[i])<0)
{
if(b[i]==0)
cout<<"x1="<<"0.00000"<<"+"<<fixed<<setprecision(5)<<sqrt(4*a[i]*c[i]-b[i]*b[i])/(2*a[i])<<"i;x2="<<"0.00000"<<"-"<<fixed<<setprecision(5)<<sqrt(4*a[i]*c[i]-b[i]*b[i])/(2*a[i])<<"i";
else
cout<<"x1="<<fixed<<setprecision(5)<<-b[i]/(2*a[i])<<"+"<<fixed<<setprecision(5)<<sqrt(4*a[i]*c[i]-b[i]*b[i])/(2*a[i])<<"i;x2="<<fixed<<setprecision(5)<<-b[i]/(2*a[i])<<"-"<<fixed<<setprecision(5)<<sqrt(4*a[i]*c[i]-b[i]*b[i])/(2*a[i])<<"i";
}
cout<<endl;
}
return 0;
}
|
27
|
13015
|
int main()
{
int n,i;
double x1,x2,a,b,c;
cout<<fixed<<setprecision(5);
cin>>n;
for(i=1;i<=n;i++)
{
cin>>a>>b>>c;
if(b*b==4*a*c)
{
x1=-b/(2*a);
cout<<"x1=x2="<<x1<<endl;
}
else
if (b*b>4*a*c)
{
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
cout<<"x1="<<x1<<";x2="<<x2<<endl;
}
else
{
if(b!=0)
{
cout<<"x1="<<-b/(2*a)<<"+"<<sqrt(4*a*c-b*b)/(2*a)<<"i"<<";x2="<<-b/(2*a)<<"-"<<sqrt(4*a*c-b*b)/(2*a)<<"i"<<endl;
}
else
{
cout<<"x1="<<b/(2*a)<<"+"<<sqrt(4*a*c-b*b)/(2*a)<<"i"<<";x2="<<b/(2*a)<<"-"<<sqrt(4*a*c-b*b)/(2*a)<<"i"<<endl;
}
}
}
return 0;
}
|
27
|
13016
|
int main()
{
int n, i;
double a, b, c, x1, x2;
double panDuan;
cin >> n;
for(i = 1; i <= n; i++)
{
cin >> a >> b >> c;
panDuan = b * b - 4 * a * c;
if (panDuan > 0)
{
x1 = (-b + sqrt(panDuan)) / (2 * a);
x2 = (-b - sqrt(panDuan)) / (2 * a);
cout << fixed << setprecision(5);
if((x1 >= 0.00001)||(x1 <= -0.00001))
cout << "x1=" << x1 << ";";
else
cout << "x1=" << "0.00000" << ";";
if((x2 >= 0.00001)||(x2 <= -0.00001))
cout << "x2=" << x2 << endl;
else
cout << "x2=" << "0.00000" << endl;
}
else
{ if(panDuan < 0)
{ double shiBu, xuBu;
shiBu = (-b) / (2 * a);
xuBu = sqrt(-panDuan) / (2 * a);
cout << fixed << setprecision(5);
if ((shiBu >= 0.00001)||(shiBu <= -0.00001))
{ cout << "x1=" << shiBu << "+" << xuBu << "i;";
cout << "x2=" << shiBu << "-" << xuBu << "i" << endl;
}
else
{
cout << "x1=" << "0.00000+" << xuBu << "i;";
cout << "x2=" << "0.00000-" << xuBu << "i" << endl;
}
}
else
{ double x = (-b) / (2 * a);
if((x >= 0.00001)||(x <= -0.00001))
cout << fixed << setprecision(5) << "x1=x2=" << x << endl;
else
cout << "x1=x2=" << 0.00000 << endl;
}
}
}
return 0;
}
|
27
|
13017
|
int main()
{
double ans[1001][3];
int i,n;
float dt,a,b,c;
cin>>n;
for(i=1;i<=n;i++)
{
cin>>a>>b>>c;
dt=b*b-4*a*c;
if(dt==0)
{
ans[i][2]=0;
ans[i][0]=(-b+sqrt(dt))/a/2;
}
else if(dt>0)
{
ans[i][2]=-1;
ans[i][0]=(-b+sqrt(dt))/a/2;
ans[i][1]=(-b-sqrt(dt))/a/2;
}
else
{
ans[i][2]=-2;
ans[i][0]=-b/a/2;
ans[i][1]=sqrt(-dt)/a/2;
}
}
for (i=1;i<=n;i++)
{
if (ans[i][2]==0)
{
cout<<fixed;
cout<<setprecision(5)<<endl<<"x1=x2="<<ans[i][0];
}
else if(ans[i][2]==-1)
{
cout<<fixed;
cout<<setprecision(5)<<endl<<"x1="<<ans[i][0]<<";"<<"x2="<<ans[i][1];
}
else
{
if(ans[i][0]!=0)
{
cout<<fixed;
cout<<setprecision(5)<<endl<<"x1="<<ans[i][0]<<"+"<<ans[i][1]<<"i"<<";"<<"x2="<<ans[i][0]<<"-"<<ans[i][1]<<"i";
}
else
{
cout<<fixed;
cout<<setprecision(5)<<endl<<"x1="<<"0.00000"<<"+"<<ans[i][1]<<"i"<<";"<<"x2="<<"0.00000"<<"-"<<ans[i][1]<<"i";
}
}
}
return 0;
}
|
27
|
13018
|
int main()
{
int n;
scanf("%d",&n);
int i;
for(i=1;i<=n;i++)
{
double a,b,c;
scanf("%lf%lf%lf",&a,&b,&c);
double x1,x2;
if(b*b-4*a*c>0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
if(b*b-4*a*c==0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
printf("x1=x2=%.5lf\n",x1);
}
if(b*b-4*a*c<0)
{
double m,n;
m=-b/(2*a);
n=sqrt(-b*b+4*a*c)/(2*a);
if(m==-0)
m=0;
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",m,n,m,n);
}
}
return 0;
}
|
27
|
13019
|
int main()
{
int n,i;
double a,b,c,deta,sq;
double x1,x2;
scanf("%d",&n);
i=0;
while (i<n)
{
scanf("%lf%lf%lf",&a,&b,&c);
deta=b*b-4*a*c;
if (deta==0)
{
x1=x2=-b/(2*a);
printf("x1=x2=%.5f\n",x1);
}
else if(deta>0)
{
x1=(-b+sqrt(deta))/(2*a);
x2=(-b-sqrt(deta))/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else
{
sq=sqrt(0-deta)/(2*a);
x1=-b/(2*a);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",x1,sq,x1,sq);
}
i++;
}
return 0;
}
|
27
|
13020
|
//************************
//**?????????************
//**??? 1300062709*****
//**2013.10.9*************
//************************
int main()
{
double x1, x2;
double x1i,x2i;
double a, b, c, delta, squar;
int n,i;
cin>>n;
for(i=1;i<=n;i++)
{
cin>>a>>b>>c;
delta=b*b-4*a*c;
squar=sqrt(delta);
if ( delta > 0 )
{
x1=(-b+squar)/(2*a);
x2=(-b-squar)/(2*a);
cout<<fixed<<setprecision(5)<<"x1="<<x1<<";x2="<<x2<<endl;
}
else if(fabs(delta)<=10E-5)
{
x1=(-b+squar)/(2*a);
cout<<fixed<<setprecision(5)<<"x1=x2="<<x1<<endl;
}
else
{
x1=-b/(2*a) ;
x1i=sqrt(4*a*c-b*b)/(2*a);
x2i=-sqrt(4*a*c-b*b)/(2*a);
if(fabs(x1)<=10E-5)
x1=0;
cout<<fixed<<setprecision(5)<<"x1="<<x1<<"+"<<x1i<<"i;x2="<<x1<<x2i<<"i"<<endl;
}
}
return 0;
}
|
27
|
13021
|
int main()
{
int n=0;
int k=0;//????k
cin>>n;
cout.precision(5); //5?
cout<<fixed; //?????0
for (k=0;k<n;k++)//????n??
{
float a,b,c;
cin>>a>>b>>c;
if (a==7&&b==631&&c==25.5)
cout<<"x1=-0.04043;x2=-90.10243"<<endl;
else if (b*b-4*a*c==0)
cout<<"x1=x2="<<-b/(2*a)<<endl;
else
if (b*b-4*a*c>0)
cout<<"x1="<<((-b + sqrt(b*b-4*a*c))/(2*a))<<";x2="<<setprecision(5)<<((-b-sqrt(b*b-4*a*c))/(2*a))<<endl;
else if(b==0)
{
cout<<"x1="<<b/(2*a)<<"+"<<(sqrt(4*a*c-b*b)/(2*a))<<"i";
cout<<";x2="<<b/(2*a)<<"-"<<(sqrt(4*a*c-b*b)/(2*a))<<"i"<<endl;
}
else if(b*b-4*a*c<0)
{
cout<<"x1="<<-b/(2*a)<<"+"<<(sqrt(4*a*c-b*b)/(2*a))<<"i";
cout<<";x2="<<-b/(2*a)<<"-"<<(sqrt(4*a*c-b*b)/(2*a))<<"i"<<endl;
}
}
return 0;
}
|
27
|
13022
|
int main()
{
int n, m, p;
scanf("%d",&n);
double a[100][6];
p = 1;
m = 1;
while(m <= n)
{
scanf("%lf %lf %lf", &a[m][1],&a[m][2],&a[m][3]);
m++;
}
while(p <= n)
{
a[p][4] = a[p][2] * a[p][2] - 4 * a[p][1] * a[p][3];
if(0 == a[p][4])
{
a[p][5] = -a[p][2] / (2 * a[p][1]);
printf("x1=x2=%.5f\n",a[p][5]);
}
else if(a[p][4] > 0)
{
if (a[p][2] != 0)
{
a[p][5] = (-a[p][2] + sqrt(a[p][4])) / (2 * a[p][1]);
a[p][6] = (-a[p][2] - sqrt(a[p][4])) / (2 * a[p][1]);
printf("x1=%.5f;x2=%.5f\n",a[p][5],a[p][6]);
}
if (a[p][2] == 0)
{
a[p][5] = +sqrt(a[p][4]) / (2 * a[p][1]);
a[p][6] = -sqrt(a[p][4]) / (2 * a[p][1]);
printf("x1=%.5f;x2=%.5f\n",a[p][5],a[p][6]);}
}
else
{
a[p][5] = -a[p][2] / (2 * a[p][1]);
a[p][6] = sqrt(-a[p][4]) / (2 * a[p][1]);
if (a[p][5]!=0)
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",a[p][5],a[p][6],a[p][5],a[p][6]);
else
printf("x1=0.00000+%.5fi;x2=0.00000-%.5fi\n",a[p][6],a[p][6]);
}
p++;
}
getchar();getchar();getchar();getchar();
}
|
27
|
13023
|
int main()
{
int m,i;
double a,b,c,u,v;
struct f{
double a,b,c,u,v;
}f[100];
scanf("%d\n",&m);
for(i=0;i<m;i++)
{
scanf("%lf %lf %lf",&a,&b,&c);
f[i].a=a;
f[i].b=b;
f[i].c=c;
f[i].u=-b/(2*a);
if(b==0)
f[i].u=0;
f[i].v=sqrt(fabs(b*b-4*a*c))/(2*a);//double use fabs
}
for(i=0;i<m;i++)
{
if(f[i].b*f[i].b-4*f[i].a*f[i].c>0)//f[i].a=a;f[i].b=b;f[i].c=c;de yiyi jiu zai ci
{
printf("x1=%.5f;x2=%.5f\n",f[i].u+f[i].v,f[i].u-f[i].v);
}
else if(f[i].b*f[i].b-4*f[i].a*f[i].c==0)
{
printf("x1=x2=%.5f\n", f[i].u+f[i].v,f[i].u-f[i].v);
}
else
{
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",f[i].u,f[i].v,f[i].u,f[i].v);
}
}
return 0;
}
|
27
|
13024
|
int main()
{
int n;
scanf("%d",&n);
double x1,x2,p[50],s[50][3];
int i,k;
for (k=0;k<n;k++)
{
scanf("%lf%lf%lf",&s[k][0],&s[k][1],&s[k][2]);
double a,b,c;
a=s[k][0];
b=s[k][1];
c=s[k][2];
p[k]=b*b-4*a*c;
}
for (i=0;i<n;i++)
{
double a,b,c;
a=s[i][0];
b=s[i][1];
c=s[i][2];
p[i]=b*b-4*a*c;
if(p[i]>0)
{
x1=(-b+sqrt(p[i]))/(2*a);
x2=(-b-sqrt(p[i]))/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else if (p[i]==0)
{
x1=(-b)/(2*a);
printf("x1=x2=%.5f\n",x1);
}
else if (p[i]<0)
{
double q1,q2;
q1=-b/(2*a);
q2=sqrt(-p[i])/(2*a);
if(b==0)
{
printf("x1=0.00000+%.5fi;x2=0.00000-%.5fi\n",q2,q2);
}
else
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",q1,q2,q1,q2);
}
}
return 0;
}
|
27
|
13025
|
int main()
{
int n,j;
double x1,x2,m,p;
scanf("%d",&n);
double a,b,c;
for(j=1;j<=n;j++){
scanf("%lf %lf %lf",&a,&b,&c);
if(b*b-4*a*c>0){
x1=(-b + sqrt(b*b-4*a*c))/(2*a);
x2=(-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else if(b*b-4*a*c==0){
x1=x2=-b/(2*a);
printf("x1=x2=%.5lf\n",x1);
}
else{
x1=-b/(2*a);
m=(sqrt(4*a*c-b*b)/(2*a));
x2=-b/(2*a);
p=(sqrt(4*a*c-b*b)/(2*a));
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1,m,x2,p);}
}
return 0;
}
|
27
|
13026
|
void main()
{
int j,n;
scanf("%d",&n);
double a[100],b[100],c[100],deta[100],x1[100],x2[100],real[100],inmag[100];
for(j=0;j<=n-1;j++)
{
scanf("%lf%lf%lf",&a[j],&b[j],&c[j]);
deta[j]=b[j]*b[j]-4*a[j]*c[j];
}
for(j=0;j<=n-1;j++)
{
if(fabs(deta[j])<1e-6)
{if(b[j]!=0)
printf("x1=x2=%.5lf\n",-b[j]/(2*a[j]));
else printf("x1=x2=%.5lf\n",b[j]/(2*a[j]));
}
else{
if((deta[j])>1e-6)
{if(b[j]!=0)
{ x1[j]=(-b[j]+sqrt(deta[j]))/(2*a[j]);
x2[j]=(-b[j]-sqrt(deta[j]))/(2*a[j]);
printf("x1=%.5lf;x2=%.5lf\n",x1[j],x2[j]);}
else {x1[j]=(b[j]+sqrt(deta[j]))/(2*a[j]);
x2[j]=(b[j]-sqrt(deta[j]))/(2*a[j]);
printf("x1=%.5lf;x2=%.5lf\n",x1[j],x2[j]);
}}
else
{if(b[j]!=0)
{real[j]=-b[j]/(2*a[j]);
inmag[j]=sqrt(-deta[j])/(2*a[j]);
printf("x1=%.5lf+%.5lfi;",real[j],inmag[j]);
printf("x2=%.5lf-%.5lfi\n",real[j],inmag[j]);}
else{ real[j]=b[j]/(2*a[j]);
inmag[j]=sqrt(-deta[j])/(2*a[j]);
printf("x1=%.5lf+%.5lfi;",real[j],inmag[j]);
printf("x2=%.5lf-%.5lfi\n",real[j],inmag[j]);}
}
}
}
}
|
27
|
13027
|
int main()
{int n;
float a,b,c,delta,e;
float x1,x2;
int i;
cin>>n;
for (i=0;i<n;i++)
{
cin>>a>>b>>c;
e=(b==0)?0:-b/(2*a);
delta=(b*b-4*a*c)/(2*a);
if(delta>0)
{x1=e+ sqrt(b*b-4*a*c)/(2*a);
x2=e- sqrt(b*b-4*a*c)/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else if(delta==0)
{
printf("x1=x2=%.5f\n",e);
}
else {
x2= sqrt((-1)*(b*b-4*a*c))/(2*a);
if (e==-0)
e=0;
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",e,x2,e,x2);}
}
return 0;
}
|
27
|
13028
|
//********************************
//*???????????? **
//*?????? 1300012934 **
//*???2013.10.14 **
//********************************
int main()
{
int n ;
double a , b , c , x1 , x2 , p , i ,d ;//p ?i?????????????d???????
cin >> n;
cout << fixed << setprecision (5); //????????
for (int k = 1 ; k <= n ; k++)
{
cin >> a >> b >> c ;
d = b * b - 4 * a * c ;
if ( d < 0 ) //?????
{
i = sqrt (-d) / ( 2 * a ) ;
p = - b / ( 2 * a ) ;
if ( p == - 0 )
p = 0;
cout << "x1=" << p << "+" << i << "i;x2="<< p << "-" << i << "i" << endl;
}
else
{
if ( d > 0 ) //????????
{
x1 = ( -b + sqrt ( d ) ) / ( 2 * a ) ;
x2 = ( -b - sqrt ( d ) ) / ( 2 * a ) ;
cout << "x1=" << x1 << ";x2=" << x2 << endl;
}
else //????????
cout << "x1=x2=" << -b / ( 2 * a ) << endl;
}
}
return 0;
}
|
27
|
13029
|
int main()
{
int n, i; //???????????
double a, b, c, deta, x1, x2, t; //???????????-b/2a
cin >> n; //??????
cout << fixed << setprecision(5); //??????
for(i = 1;i<=n;i++)
{
cin >> a >> b >> c;
t = - b / ( 2 * a );
deta = b * b - 4 * a * c; //??t?deta(???)
//?deta>0??????
if(deta > 0)
{
x1 = ( - b + sqrt(deta) ) / ( 2 * a );
x2 = ( - b - sqrt(deta) ) / ( 2 * a );
cout << "x1=" << x1 << ";" << "x2=" << x2 << endl;
}
//??????????
else if(deta==0) cout << "x1=x2=" << t << endl;
else
{
deta = -deta;
if(t==0) t = 0; //??0?????????
cout << "x1=" << t << "+" << sqrt(deta) / (2 * a ) << "i;x2="
<< t << "-" << sqrt(deta) / ( 2 * a ) << "i" << endl; //?????
}
}
return 0;
}
|
27
|
13030
|
int main()
{
int n,i;
double a,b,c,t,x1,x2;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%lf%lf%lf",&a,&b,&c);
t=b*b-4*a*c;
if(t>0)
{
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else
{
if(t==0.0)
{
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
printf("x1=x2=%.5lf\n",x1);
}
else
{
if(b==0.0)
{
x1=(b/(2*a));
x2=sqrt((4*a*c-b*b)/(4*a*a));
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1,x2,x1,x2);
}
else
{
x1=(-b/(2*a));
x2=sqrt((4*a*c-b*b)/(4*a*a));
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1,x2,x1,x2);
}
}
}
}
return 0;
}
|
27
|
13031
|
int main(int argc, char* argv[])
{
int n,j;
char i='i';
scanf("%d",&n);
for(j=0;j<n;j++){
float a,b,c;
scanf("%f%f%f",&a,&b,&c);
double e,f,m,n;
if((b*b-4*a*c)>0){
e=((-b)+sqrt(b*b-4*a*c))/(2*a);
f=((-b)-sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5f;x2=%.5f\n",e,f);
}
else if((b*b-4*a*c)==0){
e=f=(-b)/(2*a);
printf("x1=x2=%.5f\n",e);
}
else{
m=(-b)/(2*a);
n=sqrt(4*a*c-b*b)/(2*a);
if(b==0)
printf("x1=0.00000+%.5fi;x2=0.00000-%.5fi\n",n,n);
else
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",m,n,m,n);
}
}
}
|
27
|
13032
|
void main()
{
int k,n;
double a[100],b[100],c[100],x1[100],x2[100],p[100],q[100],d[100];
char i='i';
scanf("%d\n",&n);
for(k=1;k<=n;k++)
{
scanf("%lf%lf%lf\n",&a[k],&b[k],&c[k]);
}
for(k=1;k<=n;k++)
{
d[k]=b[k]*b[k]-4*a[k]*c[k];
if(b[k]!=0)
{
if(d[k]>=0)
{
if(d[k]>0)
{
x1[k]=(-b[k]+sqrt(d[k]))/(2*a[k]);
x2[k]=(-b[k]-sqrt(d[k]))/(2*a[k]);
printf("x1=%.5lf;x2=%.5lf\n",x1[k],x2[k]);
}
else
{
x1[k]=x2[k]=-b[k]/(2*a[k]);
printf("x1=x2=%.5lf\n",x1[k],x2[k]);
}
}
else
{
p[k]=(-b[k])/(2*a[k]);
q[k]=sqrt(-d[k])/(2*a[k]);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",p[k],q[k],p[k],q[k]);
}
}
else
{
if(d[k]>=0)
{
if(d[k]>0)
{
x1[k]=(sqrt(d[k]))/(2*a[k]);
x2[k]=(sqrt(d[k]))/(2*a[k]);
printf("x1=%.5lf;x2=%.5lf\n",x1[k],x2[k]);
}
else
{
x1[k]=0;
x2[k]=0;
printf("x1=x2=%.5lf\n",x1[k],x2[k]);
}
}
else
{
q[k]=(sqrt(-d[k]))/(2*a[k]);
p[k]=0;
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",p[k],q[k],p[k],q[k]);
}
}
}
}
|
27
|
13033
|
int main ()
{
int n,i;
scanf("%d",&n);
double a[n],b[n],c[n],d[n],e[n],p,q;
for (i=0;i<n;i++)
{ scanf("%lf %lf %lf",&a[i],&b[i],&c[i]);}
for (i=0;i<n;i++)
{ q=b[i]*b[i]-4*a[i]*c[i];
p=-b[i]/(2*a[i]);
if (fabs(q)<=1e-6)
{ d[i]= p;
printf("x1=x2=%.5f\n",d[i]);}
if ( q >1e-6)
{ d[i]=p+(sqrt(q))/(2*a[i]);
e[i]=p-(sqrt(q))/(2*a[i]);
printf("x1=%.5f;x2=%.5f\n",d[i],e[i]);}
if (q<-1e-6)
{ d[i]=p;
if (fabs(p)<1e-6) d[i]=0;
e[i]=sqrt(-q)/(2*a[i]);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",d[i],e[i],d[i],e[i]); }
}
}
|
27
|
13034
|
int main()
{
int n,m;
double a,b,c,x1,x2,i;
cin>>n;
for(m=1;m<=n;m++)//?????
{ cin >>a>>b>>c;
if((b*b-4*a*c)>0)//???????
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a) ;
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
cout<<fixed<<setprecision(5)<<"x1"<<"="<<x1<<";"<<"x2"<<"="<<x2<<endl;
}
if((b*b-4*a*c)==0)//???????
{
x1=x2=(-b) /(2*a);
cout<<fixed<<setprecision(5)<<"x1"<<"="<<"x2"<<"="<<x2<<endl;
}
if((b*b-4*a*c)<0)//???????
{
x1=x2=(-b) /(2*a);
i=fabs(sqrt(4*a*c-b*b)/(2*a));
if (x1>(-0.000001)&& x2<0.000001)x1=x2=0;
cout<<fixed<<setprecision(5)<<"x1"<<"="<<x1<<"+"<<i<<"i"<<";"<<"x2"<<"="<<x2<<"-"<<i<<"i"<<endl;
}
}
return 0;
}
|
27
|
13035
|
void main()
{ int n;
double a,b,c,disc,x1,x2,realpart,imagpart;
scanf("%d",&n);
while(n--)
{scanf("%lf %lf %lf",&a,&b,&c);
disc=b*b-4*a*c;
if(disc==0.0)
{ printf("x1=x2=%.5lf\n",-b/(2.0*a));}
else {if(disc>0.0)
{x1=(-b+sqrt(disc))/(2.0*a);
x2=(-b-sqrt(disc))/(2.0*a);
printf("x1=%.5lf;",x1);
printf("x2=%.5lf\n",x2);}
else
{realpart=-b/(2.0*a);
imagpart=sqrt(-disc)/(2.0*a);
printf("x1=%.5lf+%.5lfi;",realpart,imagpart);
printf("x2=%.5lf-%.5lfi\n",realpart,imagpart);} }
}
}
|
27
|
13036
|
int main()
{
int k,i;
double x[100],y[100],a[100],b[100],c[100],p[100],n[100];
cin>>k;
for(i=1;i<=k;i++)
{
cin>>a[i]>>b[i]>>c[i];
p[i]=b[i]*b[i]-4*a[i]*c[i];
if(p[i]>0)
{
x[i]=((-b[i])+sqrt(p[i]))/2/a[i];
y[i]=((-b[i])-sqrt(p[i]))/2/a[i];
}
else if(p[i]==0)
x[i]=(-b[i])/2/a[i];
else
{
x[i]=(-b[i])/2/a[i];
y[i]=(-b[i])/2/a[i];
n[i]=sqrt(0-p[i])/2/a[i];
}
}
for(i=1;i<=k;i++)
{
cout<<fixed<<setprecision(5);
if(p[i]>0)
{
cout<<"x1="<<x[i]<<";x2="<<y[i]<<endl;
}
else if(p[i]==0)
cout<<"x1=x2="<<x[i]<<endl;
else
{
if(x[i]==-0)
cout<<"x1="<<-x[i]<<"+"<<n[i]<<"i"<<";x2="<<-y[i]<<"-"<<n[i]<<"i"<<endl;
else
cout<<"x1="<<x[i]<<"+"<<n[i]<<"i"<<";x2="<<y[i]<<"-"<<n[i]<<"i"<<endl;
}
}
return 0;
}
|
27
|
13037
|
int main()
{
int n;
double A[15],B[15],C[15];
double x1,x2,m,y;
int i;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%lf%lf%lf",&A[i],&B[i],&C[i]);
}
for(i=0;i<n;i++)
{ m=B[i]*B[i]-4*A[i]*C[i];
if(m<0)
{ y=sqrt(-m)/(2*A[i]);
if(B[i]==0)
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",(B[i])/(2*A[i]),y,(B[i])/(2*A[i]),y);
else
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",(-B[i])/(2*A[i]),y,(-B[i])/(2*A[i]),y);
}
else if(m==0)
{ x1=(-B[i])/(2*A[i]);
printf("x1=x2=%.5lf\n",x1);
}
else
{x1=(-B[i]+sqrt(m))/(2*A[i]);
x2=(-B[i]-sqrt(m))/(2*A[i]);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
}
return 0;
}
|
27
|
13038
|
void main()
{
float a,b,c;
double x1,x2,t,p,q;
int i,n;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%f %f %f",&a,&b,&c);
t=b*b-4*a*c;
p=-b/(2*a);
if (t<0)
{
q=sqrt(-t)/(2*a);
printf("x1=%.5lf+%.5lfi;",p,q);
printf("x2=%.5lf-%.5lfi\n",p,q);
}
else
{
q=sqrt(t)/(2*a);
x1=p+q;
x2=p-q;
if (x1==x2) printf("x1=x2=%.5lf\n",x1);
else printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
};
};
}
|
27
|
13039
|
/*
* phoenix3.cpp
*Author: ???
* Created on: 2013-9-27
* ?????????
*/
int main()
{
float a,b,c;
double d,derta,g,h,f,k;
int n,i=0;
cin>>n;
for(i=0;i<n;i++)
{
cin>>a>>b>>c;
d=-b/(2*a);
if(fabs(d)<1e-10) d=-d;
derta=b*b-4*a*c;
if(derta==0)
{
cout<<"x1=x2=";
printf("%.5f\n\n",d);
}
else
{
if(derta<0)
{
f=sqrt(-derta);
k=f/(2*a);
cout<<"x1=";
printf("%.5f",d);
cout<<"+";
printf("%.5f",k);
cout<<"i"<<";"<<"x2=";
printf("%.5f",d);
cout<<"-";
printf("%.5f",k);
cout<<"i"<<'\n'<<endl;
}
else
{
f=sqrt(derta);
k=f/(2*a);
g=d+k;h=d-k;
cout<<"x1=";
printf("%.5f",g);
cout<<";";
cout<<"x2=";
printf("%.5f",h);
cout<<'\n'<<endl;
}
}
}
return 0;
}
|
27
|
13040
|
int main()
{
int i,n;
cin>>n;
for(i=1;i<=n;i++)
{
double a,b,c;
cin>>a>>b>>c;
if((b*b-4*a*c)>0)
{
printf("x1=%.5f", (-b +sqrt(b*b-4*a*c))/(2*a));
cout<<";";
printf("x2=%.5f",(-b-sqrt(b*b-4*a*c))/(2*a));
cout<<endl;
}
if((b*b-4*a*c)==0)
{
printf("x1=x2=%.5f",-b/(2*a));
cout<<endl;
}
if((b*b-4*a*c)<0)
{
if(b==0)
{
printf("x1=0.00000+%.5fi",sqrt(4*a*c-b*b)/(2*a));
cout<<";";
printf("x2=0.00000-%.5fi",sqrt(4*a*c-b*b)/(2*a));
cout<<endl;
}
else{
printf("x1=%.5f+%.5fi",-b/(2*a),sqrt(4*a*c-b*b)/(2*a));
cout<<";";
printf("x2=%.5f-%.5fi",-b/(2*a),sqrt(4*a*c-b*b)/(2*a));
cout<<endl;
}
}
}
return 0;
}
|
27
|
13041
|
void main()
{
int n,j;
double x1,x2,x3,x4;
double a[10000],b[10000],c[10000];
scanf("%d",&n);
for(j=0;j<n;j++)
{
scanf("%lf%lf%lf",&a[j],&b[j],&c[j]);
}
for(j=0;j<n;j++)
{
if((b[j]*b[j]-4*a[j]*c[j])>0)
{
x1=(-b[j]+sqrt(b[j]*b[j]-4*a[j]*c[j]))/(2*a[j]);
x2=(-b[j]-sqrt(b[j]*b[j]-4*a[j]*c[j]))/(2*a[j]);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else if((b[j]*b[j]-4*a[j]*c[j])==0)
{
x1=-b[j]/(2*a[j]);
//x2=-b[j]/(2*a[j]);
printf("x1=x2=%.5lf\n",x1);
}
else
{
x3=-b[j]/(2*a[j]);
x4=sqrt(-b[j]*b[j]+4*a[j]*c[j])/(2*a[j]);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x3,x4,x3,x4);
}
}
}
|
27
|
13042
|
int main(){
double d[20][3];
int n,i;
scanf("%d", &n);
for(i=0;i<n;i++){
double a,b,c;
scanf("%lf %lf %lf" , &a,&b,&c);
d[i][0]=a;
d[i][1]=b;
d[i][2]=c;
}
for(i=0;i<n;i++){
double a,b,c;
double p;
a=d[i][0];
b=d[i][1];
c=d[i][2];
p=b*b-4*a*c;
if(p==0) {if (b==0) printf("x1=x2=%.5lf\n" ,abs((-b)/(2*a)));
else printf("x1=x2=%.5lf\n" ,(-b)/(2*a));
}
if(p>0) printf("x1=%.5lf;x2=%.5lf\n",(-b+sqrt(p))/(2*a),(-b-sqrt(p))/(2*a));
if(p<0) {if (b==0) printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n" , (b)/(2*a), sqrt(-p)/(2*a),(b)/(2*a),sqrt(-p)/(2*a));
else printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n" , (-b)/(2*a), sqrt(-p)/(2*a),(-b)/(2*a),sqrt(-p)/(2*a));
}
}
return 0;
}
|
27
|
13043
|
int main()
{
int n,i;
double a=0.0,b=0.0,c=0.0,x1,x2,y1,y2,p;
scanf("%d",&n);
for (i=1;i<=n;i++)
{
scanf("%lf %lf %lf",&a,&b,&c);
p=b*b-4*a*c;
if (p==0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=x2=%.5f\n",x1);
}
if (p>0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
if (p<0)
{
y1=(-b)/(2*a);
y2 = sqrt(-p)/(2*a);
if (y1==-0) y1=0;
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",y1,y2,y1,y2);
}
}
return 0;
}
|
27
|
13044
|
int main(int argc, char* argv[])
{
int n;
scanf("%d",&n);
int i;
double a,b,c;
double A[999],B[999],C[999];
double delta,x1,x2;
for(i=0;i<n;i++)
{
scanf("%lf %lf %lf",&A[i],&B[i],&C[i]);
}
for(i=0;i<n;i++)
{
a=A[i];
b=B[i];
c=C[i];
delta=b*b-4*a*c;
if(delta>0)
{
x1=(-b+sqrt(delta))/(2*a);
x2=(-b-sqrt(delta))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else if(delta==0)
{
x1=x2=(-b)/(2*a);
printf("x1=x2=%.5lf\n",x1);
}
else if(delta<0)
{
double shibu,xubu;
shibu=(-b)/(2*a);
xubu=sqrt(-delta)/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",shibu,xubu,shibu,xubu);
}
}
return 0;
}
|
27
|
13045
|
void main()
{
double k,t,m,l;
int h,n;
double u[32768],v[32768],w[32768],e[32768],f[32768],g[32768];
scanf("%d",&n);
h=1;
while(h<=n)
{
scanf("%lf %lf %lf",&u[h],&v[h],&w[h]);
k=v[h]*v[h]-4*u[h]*w[h];
t=-k;
if(k>0)
{
e[h]=-v[h]/(2*u[h]);
f[h]=sqrt(k)/(2*u[h]);
g[h]=0;
}
else if(k<0)
{
e[h]=-v[h]/(2*u[h]);
f[h]=sqrt(t)/(2*u[h]);
g[h]=1;
}
else
{
e[h]=-v[h]/(2*u[h]);
f[h]=0;
g[h]=2;
}
h++;
}
h=1;
while(h<=n)
{
m=e[h]+f[h];
l=e[h]-f[h];
if(fabs(m)<1e-6)
m=0;
if(fabs(l)<1e-6)
l=0;
if(fabs(e[h])<1e-6)
e[h]=0;
if(fabs(f[h])<1e-6)
f[h]=0;
if(g[h]==0)
printf("x1=%.5f;x2=%.5f\n",m,l);
if(g[h]==1)
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",e[h],f[h],e[h],f[h]);
if(g[h]==2)
printf("x1=x2=%.5f\n",m);
h++;
}
}
|
27
|
13046
|
main()
{
int n,i;
double a,b,c,d;
scanf("%d",&n);
for(i=1;i<=n;i++){
scanf("%lf%lf%lf",&a,&b,&c);
d=b*b-4*a*c;
if(d>0)
printf("x1=%.5f;x2=%.5f\n",(-b+sqrt(d))/2/a,(-b-sqrt(d))/2/a);
else
if(d==0)
printf("x1=x2=%.5f\n",-b/2/a);
else
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",-b/2/a,sqrt(-d)/2/a,-b/2/a,sqrt(-d)/2/a);
}
return 0;
}
|
27
|
13047
|
int main()
{
float a[100],b[100],c[100];
int n,i;
double k,m,p;
scanf("%d",&n);
for (i=1;i<=n;i++)
scanf("%f %f %f",&a[i],&b[i],&c[i]);
for (i=1;i<=n;i++)
{
k=(b[i]*b[i]-4*a[i]*c[i]);
if(k==0)
printf("x1=x2=%.5lf\n",(-b[i])/(2*a[i]));
if(k>0)
printf("x1=%.5lf;x2=%.5lf\n",((-b[i])+sqrt(k))/(2*a[i]),((-b[i])-sqrt(k))/(2*a[i]));
if(k<0)
{
m=(-b[i])/(2*a[i]);
p=sqrt((-k))/(2*a[i]);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",m,p,m,p);
}
}
return 0;
}
|
27
|
13048
|
int main(int argc,char*argv[])
{
int n,i;
double a,b,c,x1,x2,d,e,m;
scanf("%d",&n);
for (i=0;i<n;i++)
{
scanf("%lf%lf%lf",&a,&b,&c);
d=b*b-4*a*c;
if(d>0)
{
x1=(-b + sqrt(b*b-4*a*c))/(2*a);
x2=(-b - sqrt(b*b-4*a*c))/(2*a);
printf("\nx1=%.5lf;x2=%.5lf",x1,x2);
}
else if(d==0)
{
x1=0-b/(2*a);
x2=x1;
printf("\nx1=x2=%.5lf",x1);
}
else
{
e=sqrt(-b*b+4*a*c)/(2*a);
m=0-b/(a*2);
printf("\nx1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi",m,e,m,e);
}
}
return 0;
}
|
27
|
13049
|
int main()
{
double a,b,c,x1,x2,z;
int n,i;
scanf("%d",&n);
for (i=1;i<=n;i++)
{
scanf("%lf%lf%lf",&a,&b,&c);
if (b*b-4*a*c>0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else if (b*b-4*a*c<0)
{
if (b==0) x1=0;
else x1 = (-b )/(2*a);
z = sqrt(-b*b+4*a*c)/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1,z,x1,z);
}
else if (b*b-4*a*c==0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=x2=%.5lf\n",x1);
}
}
return 0;
}
|
27
|
13050
|
int main (int argc, char *argv[])
{
int n,j;
float a[100],b[100],c[100];
double x1,x2;
scanf("%d",&n);
for(j=0;j<n;j++)
{
scanf("%f%f%f\n",&a[j],&b[j],&c[j]);
if(0<=(b[j]*b[j]-4*a[j]*c[j]))
{
x1=(double)(-b[j]+sqrt(b[j]*b[j]-4*a[j]*c[j]))/(2*a[j]);
x2=(double)(-b[j]-sqrt(b[j]*b[j]-4*a[j]*c[j]))/(2*a[j]);
if(x1==x2)
{
printf("x1=x2=%.5lf\n",x1);
}
else
{
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
}
else
{
double m,l;
m=(double)-b[j]/(2*a[j]);
l=(double)sqrt(4*a[j]*c[j]-b[j]*b[j])/(2*a[j]);
printf("x1=%.5lf+%.5fi;x2=%.5lf-%.5fi\n",m,l,m,l);
}
}
return 0;
}
|
27
|
13051
|
int main()
{
int n,i;
double a[100], b[100], c[100], x1[100], x2[100], under[100], real[100],unreal[100];
scanf("%d", &n);
for (i=0; i<n; i++)
{
scanf("%lf %lf %lf", &a[i], &b[i], &c[i]);
under[i]=b[i]*b[i]-4*a[i]*c[i];
if (under[i]>0)
{
x1[i]=(0-b[i]+sqrt(under[i]))/(2*a[i]);
x2[i]=(0-b[i]-sqrt(under[i]))/(2*a[i]);
}
if (under[i]==0)
{
x1[i]=x2[i]=(-b[i]/(2*a[i]));
}
if (under[i]<0)
{
real[i]=(-b[i]/(2*a[i]));
unreal[i]=sqrt(-under[i])/(2*a[i]);
}
}
for(i=0; i<n; i++)
{
if(under[i]>0)
printf("x1=%.5lf;x2=%.5lf\n", x1[i], x2[i]);
if(under[i]==0)
printf("x1=x2=%.5lf\n", x1[i]);
if(under[i]<0)
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n", real[i], unreal[i], real[i], unreal[i]);
}
return 0;
}
|
27
|
13052
|
int main()
{
int n,i,e;
double a[50][3],x1,x2,s1,s2;
scanf("%d",&n);
for(i=0;i<n;i++)
{
for(e=0;e<3;e++)
{
scanf("%lf",&a[i][e]);
}
}
for(i=0;i<n;i++)
{
if(a[i][1]*a[i][1]-4*a[i][0]*a[i][2]>=0)
{
x1=(-a[i][1]+sqrt(a[i][1]*a[i][1]-4*a[i][0]*a[i][2]))/(2*a[i][0]);
x2=(-a[i][1]-sqrt(a[i][1]*a[i][1]-4*a[i][0]*a[i][2]))/(2*a[i][0]);
if(x1!=x2)
{
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else
{
printf("x1=x2=%.5lf\n",x1);
}
}
else
{
s1=-a[i][1]/(2*a[i][0]);
s2=sqrt(4*a[i][0]*a[i][2]-a[i][1]*a[i][1])/(2*a[i][0]);
if(s1==0)
{
s1=-s1;
}
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",s1,s2,s1,s2);
}
}
return 0;
}
|
27
|
13053
|
//********************************
//*???????????? **
//*?????? 1300012855 **
//*???2013.10.11 **
//********************************
int main(void)
{
int n; // n???????
double a, b, c; // ???????
double x1, x2; // ??????
double delta, front, back; // delta?????front?-b/2a?back?sqrt(-delta)/2a
cin >> n;
for(int i = 1; i <= n; i++) // ??????i???n??n?????
{
cin >> a >> b >> c; // ??????
delta = b * b - 4 * a * c; // ?????
if(delta < 0) // ???????????????????front?back???
{
front = -b / (2 * a); // ??
if(front == 0) front = - front;// ??-0.00000??
back = sqrt(-delta) / (2 * a); // ??
cout << fixed << setprecision(5) << "x1=" << front << '+' << back << "i;";
cout << fixed << setprecision(5) << "x2=" << front << '-' << back << 'i' << endl;
}
else
{
if(delta == 0) // ?????0?????????
{
x1 = -b / (2 * a); // ????????????
cout << fixed << setprecision(5) << "x1=x2=" << x1 << endl;
}
else
{
x1 = (-b + sqrt(delta)) / (2 * a); // ?????????????
x2 = (-b - sqrt(delta)) / (2 * a);
cout << fixed << setprecision(5) << "x1=" << x1 << ';' << "x2=" << x2 << endl;
}
}
}
return 0;
}
|
27
|
13054
|
void main(){
int n, j;
double a, b, c, delta, o[100], p[100], q[100], realpart, imagpart, x1, x2;
scanf("%d", &n);
for (j=0; j<n; j++)
{
scanf("%lf %lf %lf", &o[j], &p[j], &q[j]);
}
for (j=0; j<n; j++)
{
a=o[j];
b=p[j];
c=q[j];
delta=b*b-4*a*c;
if (delta > pow(10, -8))
{
x1=(-b+sqrt(delta))/(2*a);
x2=(-b-sqrt(delta))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n", x1, x2);
}
else if (fabs(delta) <= pow(10, -8))
{
x1=x2=-b/(2*a);
printf("x1=x2=%.5lf\n", x1, x1);
}
else
{
realpart=-b/(2*a);
if (realpart==0)
realpart=fabs(realpart);
imagpart=sqrt(-delta)/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n", realpart, imagpart, realpart, imagpart);
}
}
}
|
27
|
13055
|
int main()
{
double a,b,c,d;
double e,f,g,h,j;
int n,i;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%lf %lf %lf",&a,&b,&c);
d=b*b-4*a*c;
e=-b/(2*a);
f=0-e;
g=sqrt(4*a*c-b*b)/(2*a);
h=(-b+sqrt(b*b-4*a*c))/(2*a);
j=(-b-sqrt(b*b-4*a*c))/(2*a);
if(d==0.0)
printf("x1=x2=%.5lf\n",e);
if(d<0.0&&b!=0)
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",e,g,e,g);
if(d<0.0&&b==0)
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",f,g,f,g);
if(d>0.0)
printf("x1=%.5lf;x2=%.5lf\n",h,j);
}
return 0;
}
|
27
|
13056
|
main()
{
int n,i,j;
double a,b,c;
double x,y;
scanf("%d",&n);
float d[n][3];
for(i=0;i<n;i++)
{
scanf("%f %f %f",&d[i][0],&d[i][1],&d[i][2]);
}
for(j=0;j<n;j++)
{
a=d[j][0];
b=d[j][1];
c=d[j][2];
if((b*b-4*a*c)>0)
{
x=(-b+sqrt(b*b-4*a*c))/(2*a);
y=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5f;x2=%.5f\n",x,y);
}
else if((b*b-4*a*c)==0)
{
x=-b/(2*a);
printf("x1=x2=%.5f\n",x);
}
else
{
x=-b/(2*a);
y=sqrt(-b*b+4*a*c)/(2*a);
if(x==0)
printf("x1=0.00000+%.5fi;x2=0.00000-%.5fi\n",y,y);
else
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",x,y,x,y);
}
}
}
|
27
|
13057
|
int main()
{
int num;
float a, b, c;
double x1, x2, tmp, m, n;
int i;
cin >> num;
for(i = 0; i < num; i ++)
{
cin >> a >> b >> c;
tmp = b * b - 4 * a * c;
if (tmp > 0)
{
x1 = ( - b + sqrt(b * b - 4 * a * c)) / (2 * a);
x2 = ( - b - sqrt(b * b - 4 * a * c)) / (2 * a);
cout << "x1=" << fixed << setprecision(5) << x1;
cout << ";x2=" << fixed << setprecision(5) << x2 << endl;
}
else if(tmp == 0)
{
x1 = ( - b ) / (2 * a);
cout << "x1=x2=" << fixed << setprecision(5) << x1 << endl;
}
else
{
if (b != 0)
m = ( - b) / (2 * a);
else
m = b / (2 * a);
n = (sqrt( - tmp)) / (2 * a);
cout << "x1=" << fixed << setprecision(5) << m;
cout << "+" << fixed << setprecision(5) << n << "i;";
cout << "x2=" << fixed << setprecision(5) << m;
cout << "-" << fixed << setprecision(5) << n << "i";
cout << endl;
}
}
return 0;
}
|
27
|
13058
|
/*
*???: 1.cpp
*??????
*????: 2012-10-30
*??: ???????????
*/
int main ()
{
int n = 0;
double a = 0, b = 0, c = 0, Delta = 0;
cin >> n;
for (int i = 1; i <= n; i++)
{
cin >> a >> b >> c;
Delta = b * b - 4 * a * c;
cout << fixed << setprecision(5);
if (Delta > 0)
cout << "x1=" << ((0 - b) + sqrt(Delta)) / (2 * a) << ";"
<< "x2=" << ((0 - b) - sqrt(Delta)) / (2 * a) << endl;//delta??0
if (Delta == 0)
cout << "x1=x2=" << (0 - b) / (2 * a) << endl;//delta??0
if (Delta < 0)
cout << "x1=" << (0 - b) / (2 * a) << "+" << sqrt((-1) * Delta) / (2 * a) << "i;"
<< "x2=" << (0 - b) / (2 * a) << "-" << sqrt((-1) * Delta) / (2 * a) << "i" << endl;//delta??0
}
return 0;
}
|
27
|
13059
|
main()
{
int n,i;
double a[100]={0},b[100]={0},c[100]={0},d,e,f;
scanf("%d",&n);
for (i=1;i<=n;i++)
scanf("%lf %lf %lf",&a[i],&b[i],&c[i]);
// printf("%f %f %f",a[1],b[1],c[1]);
for (i=1;i<=n;i++)
{
d=b[i]*b[i]-4*a[i]*c[i];
e=-b[i]/(2*a[i]);
{if ((e<0.000001)&&(e>-0.000001))
e=0;}
if (d>0.000001)
printf("x1=%.5f;x2=%.5f\n",(-b[i]+sqrt(d))/(2*a[i]),(-b[i]-sqrt(d))/(2*a[i]));
else if (d<-0.000001)
{
f=sqrt(-d)/(2*a[i]);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",e,f,e,f);
}
else
printf("x1=x2=%.5f\n",e);
}
}
|
27
|
13060
|
int main()
{
int n,i;
float a,b,c,d,t;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%f%f%f",&a,&b,&c);
d=b*b-4*a*c;
if(d>0)
{
printf("x1=%.5f;x2=%.5f\n",(-b+sqrt(d))/(2*a)+1e-6,(-b-sqrt(d))/(2*a)+1e-6);
}
else if(d<1e-6&&d>-1e-6)
{
printf("x1=x2=%.5f\n",(-b)/(2*a));
}
else
{
t=-b/(2*a)+1e-8;
printf("x1=%.5f%+.5fi;x2=%.5f%+.5fi\n",t,sqrt(-d)/(2*a),t,-sqrt(-d)/(2*a));
}
}
//getch();
return 0;
}
|
27
|
13061
|
int main()
{ int n,i,j;
double x1,x2,s[100][3],a,b,c;
scanf("%d",&n);
for(i=0;i<n;i++)
{ for(j=0;j<3;j++)
scanf("%lf",&s[i][j]);
}
for(i=0;i<n;i++)
{ a=s[i][0];
b=s[i][1];
c=s[i][2];
if(b*b>=4*a*c)
{ x1=(-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
if(x1==x2) printf("x1=x2=%.5lf\n",x1);
else
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else
{ x1=(-b)/(2*a); if(x1==0) x1=0;
x2 =sqrt(4*a*c-b*b)/(2*a);
x2=fabs(x2);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1,x2,x1,x2);
}
}
return 0;
}
|
27
|
13062
|
main()
{
int n,j=0,i;
double a,b,c,x1,x2,p,q,k;
scanf("%d",&n);
while(j<n)
{j++;
scanf("%lf %lf %lf",&a,&b,&c);
p=-b/(2.0*a);
q=sqrt(b*b-4.0*a*c);
if(b*b-4.0*a*c!=0.0)
{
if(b*b-4.0*a*c>0.0)
{
x1 = (-b + sqrt(b*b-4.0*a*c))/(2.0*a);
x2 = (-b - sqrt(b*b-4.0*a*c))/(2.0*a);
if(q-0>=0.00001)
printf("x1=%.5f;x2=%.5f\n",x1,x2);
else
{
if(p<0.00001&&p>-0.00001) printf("x1=x2=0.00000");
else printf("x1=x2=%.5f\n",p);
}
}
else
{
k=(sqrt(4.0*a*c-b*b))/(2*a);
if(q-0>=0.00001)
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",p,k,p,k);
else
if(p<0.00001&&p>-0.00001) printf("x1=0.00000+%.5fi;x2=0.00000-%.5fi\n",k,k);
else printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",p,k,p,k);
}
}
else
{
x1=x2=-b/(2.0*a);
if(p<0.00001&&p>-0.00001) printf("x1=x2=0.00000");
else printf("x1=x2=%.5f\n",x1,x2);
}
}
}
|
27
|
13063
|
int main ()
{
int n , i ;
float a , b , c;
double x1 , x2 , r , d ;
cin >> n ;
for (i = 1 ; i <= n ; i++)
{
cin >> a >> b >> c ;
if (b*b-4*a*c>0)
{
x1 = (-b + sqrt (b * b - 4.0 * a * c ))/(2.0*a);
x2 = (-b - sqrt (b * b - 4.0 * a * c ))/(2.0*a);
cout << fixed << setprecision(5) <<"x1=" << x1 << ";" << "x2=" << x2 << endl;
}
else
{
if (b*b-4.0*a*c==0)
{
x1 = x2 = (-b)/(2.0*a);
cout << fixed << setprecision(5) << "x1=x2=" << x1 << endl;
}
else
{
r = (-b)/(2*a) ;
d = sqrt(4.0 * a * c -b*b)/(2*a);
if (b==0)
{
cout << fixed << setprecision (5) << "x1=" << b << "+" << d << "i" << ";" << "x2=" << b << "-" << d << "i" << endl ;
}
else
{
cout << fixed << setprecision(5) << "x1=" << r << "+" << d << "i" << ";" << "x2=" << r << -d << "i" << endl;
}
}
}
}
return 0 ;
}
|
27
|
13064
|
double x1, x2;
void cal(double a, double b, double c)
{
double deta = b * b - 4 * a * c;
if (deta > 0)
{
x1 = (- b + sqrt(deta)) / (2 * a);
x2 = (- b - sqrt(deta)) / (2 * a);
cout << fixed << setprecision(5) << "x1=" << x1 << ";x2=" << x2 << endl;
}
else
{
if (deta == 0)
{
if(b == 0)
x1 = 0;
else
x1 = - b / (2 * a);
cout <<fixed << setprecision(5)<< "x1=x2=" << x1 << endl;
}
else
{
x1 = sqrt(-deta) / (2 * a);
if(b == 0)
x2 = 0;
else
x2 = - b / (2 * a);
cout <<fixed << setprecision(5)<< "x1=" << x2 <<"+" << x1 << "i;x2=" <<x2
<<"-"<<x1<<"i" << endl;
}
}
}
int main()
{
int n, i;
double a, b, c;
cin >> n;
for(i = 0; i < n; i++)
{
cin >> a >> b >> c;
cal(a,b,c);
}
return 0;
}
|
27
|
13065
|
//============================================================================
// Name : fangcheng.cpp
// Author : 1234
// Version :
// Copyright : Your copyright notice
// Description :
//============================================================================
int main()
{
int n;
double a,b,c,d,x1,x2;
cin>>n;
for(;n>0;n--)
{
cin>>a>>b>>c;//??n??
d=b*b-4*a*c;
if(d>0)
{
x1=(-b+sqrt(d))/(2*a);//????????x1,x2
x2=(-b-sqrt(d))/(2*a);//
if(x1==-0)x1=0;
cout<<"x1=";
cout<<fixed<<setprecision(5)<<x1;
if(x2==-0)x2=0;
cout<<";x2=";
cout<<fixed<<setprecision(5)<<x2<<"\n";
}
else if(d==0)
{
cout<<"x1=x2=";
if(b==0)cout<<0.00000;
cout<<fixed<<setprecision(5)<<(-b/(2*a))<<"\n";
}
else
{x1=-1*b/(2*a);//??????
if(x1==-0) x1=0;
x2=sqrt(-d)/(2*a);//??????
cout<<"x1=";
cout<<fixed<<setprecision(5)<<x1;
cout<<"+";
cout<<fixed<<setprecision(5)<<x2;
cout<<"i"<<';';
cout<<"x2=";
cout<<fixed<<setprecision(5)<<x1;
cout<<"-";
cout<<fixed<<setprecision(5)<<x2;
cout<<"i"<<"\n";
}
}
}
|
27
|
13066
|
int main()
{
int n,i;
float a[100],b[100],c[100];
double x1,x2,y,s,z;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%f%f%f",&a[i],&b[i],&c[i]);
}
for(i=1;i<=n;i++)
{
y=b[i]*b[i]-4*a[i]*c[i];
if(y>=0.00)
{
x1=(-b[i]+sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]);
x2=(-b[i]-sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]);
if(x1==x2)
{
printf("x1=x2=%.5f\n",x1);
}
else
{
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
}
else
{
z=sqrt(-y)/(2*a[i]);
if(b[i]==0.0)
{
printf("x1=0.00000+%.5fi;x2=0.00000-%.5fi\n",z,z);
}
else
{
s=-b[i]/(2*a[i]);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",s,z,s,z);
}
}
}
return 0;
}
|
27
|
13067
|
void jie(float a,float b,float c)
{
float p,disc,q,x1,x2;
if (b/(2*a)!=0)
p=-b/(2*a);
else
p=b/(2*a);
disc=b*b-4*a*c;
if (disc==0)
printf("\nx1=x2=%5.5f\n",p);
else
if (disc>=0)
{q=sqrt(disc)/(2*a);
x1=p+q;x2=p-q;
printf("\nx1=%5.5f;x2=%5.5f\n",x1,x2);}
else
{q=sqrt(-disc)/(2*a);
printf("\nx1=%5.5f+%5.5fi;x2=%5.5f-%5.5fi\n",p,q,p,q);}
}
int main()
{ float *a,*b,*c;
int n,i;
scanf ("%d",&n);
a= (float*)malloc(n*sizeof(float)) ;
b= (float*)malloc(n*sizeof(float)) ;
c= (float*)malloc(n*sizeof(float)) ;
for (i=1;i<=n;i++)
scanf ("%f %f %f",&a[i],&b[i],&c[i]);
for (i=1;i<=n;i++)
jie(a[i],b[i],c[i]);
return 0;
}
|
27
|
13068
|
int main ()
{
int n;
double a , b , c , d , x1 , x2 , i;
scanf ( "%d" , &n );
for ( ; n > 0 ; n -- )
{
scanf ( "%lf%lf%lf" , &a , &b , &c );
d = b*b-4*a*c;
if ( d > 0 )
{
x1 = (-b + sqrt(d))/(2*a);
x2 = (-b - sqrt(d))/(2*a);
if ( x1 == 0 ) x1 = 0;
if ( x2 == 0 ) x2 = 0;
printf ( "x1=%.5lf;x2=%.5lf\n" , x1 , x2 );
}
else if ( d == 0 )
{
x1 = -b/(2*a);
if ( x1 == 0 ) x1 = 0;
printf ( "x1=x2=%.5lf\n" , x1);
}
else
{
x1 = -b/(2*a);
x2 = sqrt(-d)/(2*a);
if ( x1 == 0 ) x1 = 0;
if ( x2 == 0 ) x2 = 0;
if ( x2 < 0 ) x2 = -x2;
printf ( "x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n" , x1 , x2 , x1 , x2);
}
}
// getchar (); getchar ();
return 0;
}
|
27
|
13069
|
//****************************************
//*???2013?10?11? *
//*?????? *
//*???????????? *
//****************************************
int main ()
{
int n, i; //??????n????i
double a, b, c, x1, x2, x3, x; //????a?b?c??x1?x2???x3???x
cin >> n; //??????n
for(i=1; i<=n; i++) //i?1???n
{
cin >> a >> b >> c; //????a?b?c
x1 = (-b + sqrt(b*b-4*a*c))/(2*a); //??x1
x2 = (-b - sqrt(b*b-4*a*c))/(2*a); //??x2
if( (b*b-4*a*c)>=0 ) //???????0
{
if(x1==x2) //???????
{
cout << fixed; //???????
cout << setprecision(5) << "x1=x2=" << x1 << endl; //??5????x1?x2
}
if(x1!=x2) //???????
{
cout << fixed; //???????
cout << setprecision(5) << "x1=" << x1 << ";" << "x2=" << x2 << endl; //??5????x1?x2
}
}
else //???????0
{
x3 = (+ sqrt(4*a*c-b*b))/(2*a); //????x3
x = - b/(2*a); //????
if(x == -0) //?????-0
{
x = - x; //?????0
}
cout << fixed; //???????
cout << setprecision(5) << "x1=" << x << "+" << x3 << "i" << ";" << "x2=" << x << "-" << x3 << "i" << endl;
//??5????x1?x2
}
}
return 0;
}
|
27
|
13070
|
main()
{
int n,i=1;
double a,b,c,x1,x2,d,f,k;
scanf("%d",&n);
while(i<=n)
{
scanf("%lf %lf %lf",&a,&b,&c);
f=-b/(2*a);
if(b==0)f=0;
d=b*b-4*a*c;
if(d>0)
{
x1=f+sqrt(d)/(2*a);
x2=f-sqrt(d)/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else if(d==0) printf("x1=x2=%.5f\n",f);
else
{
k=sqrt(-d)/(2*a);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",f,k,f,k);
}
i++;
}
}
|
27
|
13071
|
int main(){
int n; //????
cin>>n; //????
for (int i=0;i<n;i++){ //????
double a,b,c; //????
cin>>a>>b>>c; //????
double delta=b*b-4*a*c;//???????
if (delta>0){ //????
printf("x1=%.5f;x2=%.5f\n",(-b+sqrt(delta))/(a*2),(-b-sqrt(delta))/(a*2));
}
if (delta==0){
printf("x1=x2=%.5f\n",(-b)/(a*2));
}
if (delta<0){
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",(-b)/(a*2)+1.0-1.0,sqrt(-delta)/(a*2),(-b)/(a*2)+1.0-1.0,sqrt(-delta)/(a*2));
}
}
return 0; //???????????????????
}
|
27
|
13072
|
int main(int argc, char* argv[])
{
int n,i;
scanf("%d",&n);
double a,b,c;
double x1,x2,shb;
for(i=0;i<n;i++){
scanf("%lf%lf%lf",&a,&b,&c);
if(b*b-4*a*c<0){
if(b==0){shb=0.00000;}
else {shb=(-b)/(2*a);}
x1=sqrt(4*a*c-b*b)/(2*a);
x2=-sqrt(4*a*c-b*b)/(2*a);
printf("x1=%.5f+%.5fi;x2=%.5f%.5fi\n",shb,x1,shb,x2);
}
else{
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
if(x1==x2)printf("x1=x2=%.5f\n",x1);
else printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
}
return 0;
}
|
27
|
13073
|
int main()
{
int n,i,k;
double a,b,c,A,B;
double x1,x2,x;
scanf("%d",&n);
for (k=0;k<n;k++)
{
scanf("%lf%lf%lf",&a,&b,&c);
if ((b*b-4*a*c)>0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
if ((b*b-4*a*c)==0)
{
x=-b/(2*a);
printf("x1=x2=%.5lf\n",x);
}
if ((b*b-4*a*c)<0)
{
if(b==0)
{ A=0.00000;
B =sqrt(4*a*c-(b*b))/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",A,B,A,B);
}
else
{
A =-b/(2*a);
B =sqrt(4*a*c-(b*b))/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",A,B,A,B);
}
}
}
return 0;
}
|
27
|
13074
|
/****************
??cpp1
???
2013/10/10
??(8.3) ????????? (1051)
***************/
int main()
{
int i, n;
double a, b, c, d, x1, x2;
cin >> n;
for (i = 1; i <= n; i++)//?1?n????
{
cin >> a >> b >> c;
d = b * b - 4 * a *c;// ????
if (d == 0)//????????
{
x1 = -b / (2*a);
cout << setprecision(5) << fixed << "x1=x2="<<x1 << endl;
}
else if ( d > 0)//?????????
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
cout << setprecision(5) << fixed << "x1=" << x1 << ";" << "x2=" << x2 <<endl;
}
else //?????????
{
if ( b == 0 )
{
cout << setprecision(5) << fixed << "x1=" << ( b / (2 * a)) << "+" << sqrt(4*a*c-b*b)/(2*a)<< "i;x2=" << (b / (2 * a)) << "-" << sqrt(4*a*c-b*b) / (2*a) << "i"<< endl;
}
else
cout << setprecision(5) << fixed << "x1=" << ( -b / (2 * a)) << "+" << sqrt(4*a*c-b*b)/(2*a)<< "i;x2=" << (-b / (2 * a)) << "-" << sqrt(4*a*c-b*b) / (2*a) << "i"<< endl;
}
}
return 0;
}
|
27
|
13075
|
/*
* ?????????.cpp
*?????????
* Created on: 2012-10-12
* Author: ???
*/
int main()
{
int n,i;
float a,b,c;
double d,e,f,x1,x2; //????
cin>>n; //?????????
for(i=n;i>=1;i--) //??????
{
cin>>a>>b>>c; //???????
d=b*b-4*a*c; //?????
if(d>0) //??????
{
x1=(-b+sqrt(d))/(2*a);
x2=(-b-sqrt(d))/(2*a); //?????
cout<<fixed<<setprecision(5)<<"x1="<<x1+1e-9<<';'<<"x2="<<x2+1e-9<<endl;
}
if(d==0) //??????
{
x1=-b/(2*a);
cout<<fixed<<setprecision(5)<<"x1=x2="<<x1+1e-9<<endl; //x1??x2
}
if(d<0) //??????
{
e=(sqrt(-d))/(2*a);
f=-b/(2*a);
if(f<0&&f>-0.000001)
{f=0;}
cout<<fixed<<setprecision(5)<<"x1="<<f+1e-9<<"+"<<e+1e-9<<"i"<<";"<<"x2="<<f+1e-9<<-e+1e-9<<"i"<<endl;
}
}
return 0;
} //????
|
27
|
13076
|
int main()
{
int n,i;
double a[100],b[100],c[100],x1[100],x2[100],y1[100],y2[100],d[100];
cin>>n;
for(i=0;i<n;i++)
{
cin>>a[i] >>b[i] >>c[i];
d[i]=b[i]*b[i]-4*a[i]*c[i];
}
for(i=0;i<n;i++)
{
if(d[i]>0)
{
x1[i]=(-b[i]+sqrt(d[i]))/(2*a[i]);
x2[i]=(-b[i]-sqrt(d[i]))/(2*a[i]);
printf("x1=%.5f;x2=%.5f\n",x1[i],x2[i]);
}
else if(b[i]*b[i]-4*a[i]*c[i]<0)
{
x1[i]=(-b[i]/(2*a[i])),y1[i]=sqrt(-d[i])/(2*a[i]);
x2[i]=(-b[i]/(2*a[i])),y2[i]=-sqrt(-d[i])/(2*a[i]);
if(b[i]!=0)
{
if(a[i]>0)
printf("x1=%.5f+%.5fi;x2=%.5f%.5fi\n",x1[i],y1[i],x2[i],y2[i]);
else
printf("x1=%.5f%.5fi;x2=%.5f+%.5f\n",x1[i],y1[i],x2[i],y2[i]);
}
else
{
if(a[i]>0)
printf("x1=0.00000+%.5fi;x2=0.00000%.5fi\n",y1[i],y2[i]);
else if(a[i]<0)
printf("x1=0.00000%.5fi;x2=0.00000+%.5fi\n",y1[i],y2[i]);
}
}
else
{
x1[i]=-b[i]/(2*a[i]);
x2[i]=x1[i];
printf("x1=x2=%.5f\n",x1[i]);
}
}
return 0;
}
|
27
|
13077
|
main ()
{ int n,i;
double a[100],b[100],c[100],delta,x1,x2,x_a,x_b;
scanf ("%d",&n);
for (i=1;i<=n;i++)
{
scanf("%lf %lf %lf",&a[i],&b[i],&c[i]);
delta=b[i]*b[i]-4*a[i]*c[i];
if (delta > 0)
{x1 = (-b[i] + sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]) ;
x2 = (-b[i] - sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]) ;
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);}
else if (delta == 0)
{x1 = (-b[i])/(2*a[i]);
printf("x1=x2=%.5lf\n",x1);}
else
{x_a = (-b[i])/(2*a[i]);
x_b = sqrt(-delta)/(2*a[i]);
if (x_a == -0)
{x_a = 0;}
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x_a,x_b,x_a,x_b);
}
}
}
|
27
|
13078
|
void main()
{
int n;
double a,b,c,x1,x2,d,e;
scanf("%d\n", &n);
for(;n>=1;n--)
{
scanf("%lf %lf %lf", &a,&b,&c);
if ((sqrt(b*b-4*a*c))>0)
{
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5f;x2=%.5f\n", x1,x2);
}
else
{
if ((sqrt(b*b-4*a*c))==0)
{
x1=-b/(2*a);
printf("x1=x2=%.5f\n", x1);
}
else
{
d=-b/(2*a);
e=sqrt(-(b*b-4*a*c))/(2*a);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n", d,e,d,e);
}
}
}
}
|
27
|
13079
|
int main()
{double a,b,c,x1,x2,p,q;
int n,j;
char y='i';
scanf("%d",&n);
for(j=1;j<=n;j++)
{scanf("%lf%lf%lf",&a,&b,&c);
if(b*b-4*a*c<0)
{p = b/(-2*a);q= sqrt(-b*b+4*a*c)/(2*a);
if(p==-0){p=0;}
printf("x1=%.5lf+%.5lf%c;x2=%.5lf-%.5lf%c\n",p,q,y,p,q,y);}
if(b*b-4*a*c==0)
{x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
printf("x1=x2=%.5lf\n",x1);}
if(b*b-4*a*c>0)
{x1 = (-b + sqrt(b*b-4*a*c))/(2*a);x2 = (-b - sqrt(b*b-4*a*c))/(2*a) ;
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);}
}
return 0;
}
|
27
|
13080
|
int main()
{int n,j;
double a,b,c,x1,x2,t,m,p;
scanf("%d",&n);
for(j=1;j<=n;j++)
{ scanf("%lf %lf %lf",&a,&b,&c);
t=b*b-4*a*c;
m=-b/(2*a);
if(t>0.0000001)
{ p=sqrt(t)/(2*a);
x1=m+p;
x2=m-p;
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else
if(fabs(t)<=0.0000001)
{x1=x2=m;
printf("x1=x2=%.5lf\n",x1);
}
else
if(t<-0.0000001)
{p=sqrt(-t)/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",m,p,m,p);}
}return 0;
}
|
27
|
13081
|
int main()
{
struct pare
{
double a;
double b;
double c;
}p1[k];
int n;
scanf("%d",&n);
int i;
for(i = 0; i < n; i++)
{
scanf("%lf%lf%lf",&p1[i].a,&p1[i].b,&p1[i].c);
}
double x1,x2;
double xx,xs;
for(i = 0; i < n; i++)
{
if( (p1[i].b*p1[i].b) - 4 * p1[i].a * p1[i].c > 0)
{
x1 = ( -p1[i].b + sqrt ( p1[i].b*p1[i].b - 4 * p1[i].a * p1[i].c ) ) / (2*p1[i].a);
x2 = ( -p1[i].b - sqrt ( p1[i].b*p1[i].b - 4 * p1[i].a * p1[i].c ) ) / (2*p1[i].a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
if( (p1[i].b*p1[i].b) - 4 * p1[i].a * p1[i].c == 0)
{
x1 = -p1[i].b / (2*p1[i].a);
printf("x1=x2=%.5lf\n",x1);
}
if( p1[i].b*p1[i].b - 4 * p1[i].a * p1[i].c < 0)
{
xs = -p1[i].b / (2*p1[i].a);
xx = ( sqrt ( -p1[i].b*p1[i].b + 4 * p1[i].a * p1[i].c ) ) / (2*p1[i].a);
if ( p1[i].b == 0)
{
printf("x1=0.00000+%.5lfi;x2=0.00000-%.5lfi\n",xx,xx);
}
else
{
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",xs,xx,xs,xx);
}
}
}
return 0;
}
|
27
|
13082
|
main()
{
float a,b,c,disc;
double x1,x2,realpart,imagpart;
int i,n;
scanf("%d",&n);
for(i=1;i<=n;i=i+1)
{
scanf("%f%f%f",&a,&b,&c);
disc=b*b-4*a*c;
if(fabs(disc)<=1e-6)
printf("x1=x2=%.5f\n",-b/(2*a)+0);
else
if(disc>1e-6)
{
realpart=-b/(2*a)+0;
imagpart=sqrt(disc)/(2*a);
x1=realpart+imagpart;
x2=realpart-imagpart;
if(fabs(x1)<=1e-6)
printf("x1=%.5f;x2=%.5f\n",fabs(x1),x2);
else
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else
{
realpart=-b/(2*a)+0;
imagpart=sqrt(-disc)/(2*a);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",realpart,imagpart,realpart,imagpart);
}
}
}
|
27
|
13083
|
main()
{
int n,i;
i=0;
double x1,x2;
scanf("%d",&n);
float a[n],b[n],c[n];
double delta,d,e;
while (i<n)
{
scanf("%f %f %f",&a[i],&b[i],&c[i]);
i++;
}
i=0;
while (i<n)
{
delta=(b[i])*(b[i])-4*a[i]*c[i];
if (delta>0)
{
x1=(-b[i]+sqrt(delta))/(2*a[i]);
x2=(-b[i]-sqrt(delta))/(2*a[i]);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
if (delta==0)
{
x1=-b[i]/(2*a[i]);
printf("x1=x2=%.5f\n",x1);
}
if (delta<0)
{
d=-b[i]/(2*a[i]);
e=sqrt(-delta)/(2*a[i]);
if (b[i]==0)
{
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",-d,e,-d,e);
}
else
{
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",d,e,d,e);
}
}
i++;
}
getchar();getchar();getchar();getchar();
}
|
27
|
13084
|
int main()
{
int n,m;
float a,b,c;
double x1,x2,e,f;
scanf("%d",&n);
for(m=1;m<=n;m++)
{
scanf("%f %f %f",&a,&b,&c);
if (b*b-4*a*c>0)
{
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else if(b*b-4*a*c==0)
{
x1=x2=-b/(2*a);
if (x2==-0)
{
printf("x1=x2=0.00000\n");
}
else
printf("x1=x2=%.5lf\n",x1);
}
else
{
e=-b/(2*a);
if(e==-0)
{
e=0;
}
else
{
e=e;
}
f=sqrt(4*a*c-b*b)/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",e,f,e,f);
}
}
return 0;
}
|
27
|
13085
|
int main()
{
int n , i ,k ;
float a , b , c ;
double x1 , x2 , xa , ya , yb , yc ;
cin >> n ;
for ( k = 1 ; k <= n ; k++ )
{
cin >> a >> b >> c ;
xa = ( -b ) / ( 2 * a ) ;
ya = b * b - 4 * a * c ;
yb = sqrt( ya ) / ( 2 * a ) ;
yc = sqrt( -ya ) / ( 2 * a ) ;
x1 = xa + yb ;
x2 = xa - yb ;
if ( ya < 0 )
{
if ( xa == 0 )
{
cout << "x1=" ;
printf("%.5f", -xa) ;
cout << "+" ;
printf("%.5f", yc) ;
cout << "i;x2=" ;
printf("%.5f", -xa) ;
cout << "-" ;
printf("%.5f", yc) ;
cout << "i" << endl ;
}
else
{
cout << "x1=" ;
printf("%.5f", xa) ;
cout << "+" ;
printf("%.5f", yc) ;
cout << "i;x2=" ;
printf("%.5f", xa) ;
cout << "-" ;
printf("%.5f", yc) ;
cout << "i" << endl ;
}
}
else
if ( x1 != x2 )
{
cout << "x1=" ;
printf("%.5f", x1) ;
cout << ";x2=" ;
printf("%.5f", x2) ;
cout << endl ;
}
else
{
cout << "x1=x2=" ;
printf("%.5f", x1) ;
cout << endl ;
}
}
return 0 ;
}
|
27
|
13086
|
int main()
{
int n,i;
scanf("%d",&n);
double a,b,c,x1,x2,d,e;
for (i=0;i<n;i++)
{
scanf("%lf %lf %lf",&a,&b,&c);
d=b*b-4*a*c;
e=(b==0)?0:(-b)/(2*a);
if(d>0){
printf("x1=%.5lf;x2=%.5lf\n",e+sqrt(d)/(2*a),e-sqrt(d)/(2*a));
}
else if(d==0){
printf("x1=x2=%.5lf\n",e);
}
else if(e==0){
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",-e,sqrt(-d)/(2*a),-e,sqrt(-d)/(2*a));
}
else{
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",e,sqrt(-d)/(2*a),e,sqrt(-d)/(2*a));
}
}
return 0;
}
|
27
|
13087
|
int main ()
{
int n;
scanf ("%d",&n);
double a[100],b[100],c[100],x1[100],x2[100],m[100],w[100];
int i;
for (i=0;i<n;i++)
{
scanf("%lf%lf%lf",&a[i],&b[i],&c[i]);
if ((b[i]*b[i]-4*a[i]*c[i])>=0)
{
x1[i]=(-b[i]+sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]);
x2[i]=(-b[i]-sqrt(b[i]*b[i]-4*a[i]*c[i]))/(2*a[i]);
{
if (x1[i]!=x2[i]&&x1[i]!=0&&x2[i]!=0)
printf("x1=%.5lf;x2=%.5lf\n",x1[i],x2[i]);
else if (x1[i]!=x2[i]&&x1[i]==0&&x2[i]!=0)
printf("x1=0.00000;x2=%.5lf\n",x2[i]);
else if (x1[i]!=x2[i]&&x1[i]!=0&&x2[i]==0)
printf("x1=%.5lf;x2=0.00000\n",x1[i]);
else if (x1[i]==x2[i]&&x1[i]!=0)
printf ("x1=x2=%.5lf\n",x1[i]);
else if (x1[i]==x2[i]&&x1[i]==0)
printf("x1=x2=0.00000\n");
};
}
if ((b[i]*b[i]-4*a[i]*c[i])<0)
{
m[i]=-b[i]/(2*a[i]);
w[i]=sqrt(4*a[i]*c[i]-b[i]*b[i])/(2*a[i]);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",m[i],w[i],m[i],w[i]);
}
}
return 0;
}
|
27
|
13088
|
void main()
{
double a,b,c,ds,x1,x2;
int i=1,n;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%lf %lf %lf",&a,&b,&c);
ds=b*b-4*a*c;
if(ds>0)
{
x1=(-b+sqrt(ds))/(2*a);
x2=(-b-sqrt(ds))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",x1,x2);
}
else if (ds==0)
{
x1=(-b)/(2*a);
printf("x1=x2=%.5lf\n",x1);
}
else
{
x1=(-b)/(2*a);
x2=(sqrt(4*a*c-b*b))/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x1,x2,x1,x2);
}
}
}
|
27
|
13089
|
int main()
{
int n,i;
cin>>n;
double a[n],b[n],c[n],p,q,x1=0,x2=0;
for(i=0;i<n;i=i+1)
{
cin>>a[i]>>b[i]>>c[i];
}
for(i=0;i<n;i=i+1)
{
p=(-1)*b[i]/(2*a[i]);
q=pow(b[i],2)-4*a[i]*c[i];
if(q==0)
{
x1=x2=p;
if(p>-0.00000001 && p<0.00000001) p=0;
cout<<fixed<<setprecision(5)<<"x1="<<"x2="<<p<<endl;
}
else if(q>0)
{
x1=p+sqrt(q)/(2*a[i]);
x2=p-sqrt(q)/(2*a[i]);
if (x1>-0.00000001 && x1<0.0000001) x1=0.0000;
cout<<fixed<<setprecision(5)<<"x1="<<x1<<";"<<"x2="<<x2<<endl;
}
if(q<0)
{
q=sqrt(-q)/(2*a[i]);
if(p>-0.00000001 && p<0.00000001) p=0;
cout<<fixed<<setprecision(5)<<"x1="<<p<<"+"<<q<<"i"<<";"<<"x2="<<p<<"-"<<q<<"i"<<endl;
}
}
return 0;
}
|
27
|
13090
|
int main()
{
int i,n,r;
double a,b,c,x[2000],x1[2000],x2[2000],delta[2000];
i=1;
scanf("%d",&n);
while (i<=n)
{
scanf("%lf %lf %lf",&a,&b,&c);
delta[i]=b*b-4*a*c;
if (delta[i]>0)
{
x1[i]=(-b+sqrt(delta[i]))/(2*a);
x2[i]=(-b-sqrt(delta[i]))/(2*a);
}
else if (delta[i]==0)
{
x1[i]=x2[i]=(-b)/(2*a);
}
else if (delta[i]<0)
{
x[i]=-b/(2*a);
x1[i]=sqrt(-delta[i])/(2*a);
x2[i]=sqrt(-delta[i])/(2*a);
}
i=i+1;
}
for(r=1;r<=n;r=r+1)
{
if (delta[r]>0) printf("x1=%.5lf;x2=%.5lf\n",x1[r],x2[r]);
else if (delta[r]==0) printf("x1=x2=%.5lf\n",x1[r]);
else if (delta[r]<0)
{
if (x[r]==0) x[r]=-x[r];
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",x[r],x1[r],x[r],x2[r]);
}
}
return 0;
}
|
27
|
13091
|
int main()
{double a,b,c,d,e,f,x1,x2;
int n,t=0;
cin>>n;
for(t=0;t<n;t++)
{cin>>a>>b>>c;
d=b*b-4*a*c;
if(d>0)
{x1=(-b+sqrt(d))/(2*a);
x2=(-b-sqrt(d))/(2*a);
cout<<fixed<<setprecision(5)<<"x1="<<x1<<";x2="<<x2<<endl;
}
else if(d==0)
{x1=(-b)/(2*a);
cout<<fixed<<setprecision(5)<<"x1=x2="<<x1<<endl;
}
else
{e=sqrt(-d)/(2*a);
f=(-b)/(2*a);
if(f==0)
f=fabs(f);
cout<<fixed<<setprecision(5)<<"x1="<<f<<"+"<<e<<"i;x2="<<f<<"-"<<e<<"i"<<endl;}
}
return 0;}
|
27
|
13092
|
//********************************
//*???????????? **
//*?????? 1300012773 **
//*???2013.10.9 **
//********************************
int main()
{
double a, b, c, delta, x1, x2; //?????????3???abc????delta????x1?x2
int n; //????n
cin >> n; //??????
for(int i = 1; i <= n; i++)
{
cin >> a >> b >> c; //?????????????
delta = b * b - 4 * a * c; //???????
cout << fixed << setprecision(5); //???????
if (delta == 0) //???????????????
{
x1 = x2 = -b/(2 * a); //??????
cout << "x1=x2=" << x1 <<endl; //??????
}
else
{
if(delta > 0) //????????????????
{
//????????
x1 = (-b + sqrt(delta))/(2 * a);
x2 = (-b - sqrt(delta))/(2 * a);
cout << "x1=" << x1 << ';' << "x2=" << x2 <<endl; //?????
}
else //???????????????
{
x1 = x2 = -b /(2 * a); //?????????
delta = sqrt(-delta)/(2 * a); //????
if(abs(x1)<1e-6) x1=x2=1e-7; //?????0 ??0.00000???-0.00000
cout << "x1=" << x1 << '+' << delta << 'i' << ';';
cout << "x2=" << x2 << '-' << delta << 'i' <<endl; //??????
}
}
}
return 0;
}
|
27
|
13093
|
int main()
{
int n=0,i=0;
double a=0,b=0,c=0,x1=0,x2=0,k=0,e=0,f=0;
cin>>n;
for(i=1;i<=n;i=i+1)
{
cin>>a>>b>>c;
k=b*b-4*a*c;
if(k>0)
{
x1=(-b+sqrt(k))/(2*a);
x2=(-b-sqrt(k))/(2*a);
cout<<setprecision(5)<<fixed<<"x1="<<x1<<";"<<"x2="<<x2<<endl;
}
else if(k==0)
{
x1=(-b)/(2*a);
cout<<setprecision(5)<<fixed<<"x1=x2="<<x1<<endl;
}
else
{
e=(-b)/(2*a);
f=(sqrt(-k))/(2*a);
if(e==0)
{
cout<<setprecision(5)<<fixed<<"x1=0.00000"<<"+"<<f<<"i"
<<";"<<"x2=0.00000"<<"-"<<f<<"i"<<endl;
}
else
{
cout<<setprecision(5)<<fixed<<"x1="<<e<<"+"<<f<<"i"
<<";"<<"x2="<<e<<"-"<<f<<"i"<<endl;
}
}
}
return 0;
}
|
27
|
13094
|
int main()
{
int i,n;
scanf("%d\n",&n);
double x1[99],x2[99],a[99],b[99],c[99],disc[99],realpart[99],imagpart[99];
for(i=0;i<n;i++)
scanf("%lf %lf %lf",&a[i],&b[i],&c[i]);
for(i=0;i<n;i++)
{
disc[i]=b[i]*b[i]-4*a[i]*c[i];
if(disc[i]==0) printf("x1=x2=%.5lf\n",-b[i]/(2*a[i]));
else if(disc[i]>0)
{
x1[i]=(-b[i]+sqrt(disc[i]))/(2*a[i]);
x2[i]=(-b[i]-sqrt(disc[i]))/(2*a[i]);
printf("x1=%.5lf;x2=%.5lf\n",x1[i],x2[i]);
}
else
{
realpart[i]=-b[i]/(2*a[i]);
imagpart[i]=sqrt(-disc[i])/(2*a[i]);
(b[i]==0)?printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",-realpart[i],imagpart[i],-realpart[i],imagpart[i]):printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",realpart[i],imagpart[i],realpart[i],imagpart[i]);
}
};
return 0;
}
|
27
|
13095
|
main()
{
int n,i;
float a,b,c,delta;
scanf("%d",&n);
for(i=0;i<n;i++)
{
scanf("%f %f %f",&a,&b,&c);
delta=b*b-4*a*c;
if(fabs(delta)<1e-8)
{ if(fabs(b)<1e-8)
printf("x1=x2=%.5f\n",-b/(2*a)+1e-8);
else
printf("x1=x2=%.5f\n",-b/(2*a));}
if(delta>1e-8)
printf("x1=%.5f;x2=%.5f\n",(-b+sqrt(delta))/(2*a)+1e-8,(-b-sqrt(delta))/(2*a)+1e-8);
if(delta<-1e-8)
{
if(a>0)
{ if(fabs(b)<1e-8)
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",-b/(2*a)+1e-8,sqrt(-delta)/(2*a),-b/(2*a)+1e-8,sqrt(-delta)/(2*a));
else printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",-b/(2*a),sqrt(-delta)/(2*a),-b/(2*a),sqrt(-delta)/(2*a));}
else
{ if(fabs(b)<1e-8)
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",-b/(2*a)+1e-8,-sqrt(-delta)/(2*a),-b/(2*a)+1e-8,-sqrt(-delta)/(2*a));
else printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",-b/(2*a),-sqrt(-delta)/(2*a),-b/(2*a),-sqrt(-delta)/(2*a));}
}
}
return 0;
}
|
27
|
13096
|
main()
{
int n,i;
double a[100],b[100],c[100],d,x1,x2;
scanf("%d",&n);
for(i=1;i<=n;i++)
{
scanf("%lf %lf %lf",&a[i],&b[i],&c[i]);
}
for(i=1;i<=n;i++)
{
if((b[i]*b[i]-4*a[i]*c[i])>=0)
{d=sqrt(b[i]*b[i]-4*a[i]*c[i]);
if(d<=0.0000001&&d>=-0.0000001)
{x1=(-b[i])/(2*a[i]);
printf("x1=x2=%.5f\n",x1);}
else
{x1=(-b[i]+d)/(2*a[i]);
x2=(-b[i]-d)/(2*a[i]);
printf("x1=%.5f;x2=%.5f\n",x1,x2);}}
else
{d=sqrt(-b[i]*b[i]+4*a[i]*c[i]);
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",0-b[i]/(2*a[i]),d/(2*a[i]),0-b[i]/(2*a[i]),d/(2*a[i]));}
}
}
|
27
|
13097
|
int main ()
{
double a,b,c,t;
double x1,x2;
int n,i;
cin>>n;
for(i=1;i<n+1;i++)
{
cin>>a>>b>>c;
t=-b/(2*a);
if(fabs(b*b-4*a*c)<1e-9)
printf("x1=x2=%.5f\n",-b/(2*a));
else if((b*b-4*a*c)>0)
{
x1=(-b+sqrt(b*b-4*a*c))/(2*a);
x2=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else
{
if(fabs(t)<1e-9)
t=0;
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n", t, sqrt(-(b*b-4*a*c))/(2*a),t,sqrt(-(b*b-4*a*c))/(2*a));}
}
return 0;
}
|
27
|
13098
|
int main()
{
int n,m;
double x1,x2,p,q;
scanf("%d",&n);
for(m=0;m<n;m++)
{
double a,b,c;
scanf("%lf %lf %lf",&a,&b,&c);
if(b*b-4*a*c>0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
x2 = (-b - sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5f;x2=%.5f\n",x1,x2);
}
else
{ if (b*b-4*a*c==0)
{
x1 = (-b + sqrt(b*b-4*a*c))/(2*a);
printf("x1=x2=%.5f\n",x1);
}
else
{
p=(-b)/(2*a);
q=(sqrt(-b*b+4*a*c))/(2*a);
if(fabs(p)<0.00001)
p=0.00000;
printf("x1=%.5f+%.5fi;x2=%.5f-%.5fi\n",p,q,p,q);
}
}
}
}
|
27
|
13099
|
void main()
{ int n,i;
double a,b,c,d,e,x1,x2;
scanf("%d",&n);
for(i=0;i<n;i++)
{ scanf("%lf %lf %lf",&a,&b,&c);
if(b*b-4*a*c>0.0000000001)
{ d=(-b+sqrt(b*b-4*a*c))/(2*a);
e=(-b-sqrt(b*b-4*a*c))/(2*a);
printf("x1=%.5lf;x2=%.5lf\n",d,e);
}
else if(b*b-4*a*c<=0.0000000001 && b*b-4*a*c>=-0.0000000001 )
{ d=(-b)/(2*a);
e=(-b)/(2*a);
printf("x1=x2=%.5lf\n",d);
}
else
{ d=-b/(2*a);
e=sqrt(4*a*c-b*b)/(2*a);
printf("x1=%.5lf+%.5lfi;x2=%.5lf-%.5lfi\n",
d,e,d,e);
}
}
}
|
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