Function to check if they are identical
void idstrt ( double a1 , double b1 , double c1 , double a2 , double b2 , double c2 ) { if ( ( a1 / a2 == b1 / b2 ) && ( a1 / a2 == c1 / c2 ) && ( b1 / b2 == c1 / c2 ) ) cout << " The ▁ given ▁ straight " << " ▁ lines ▁ are ▁ identical " << endl ; else cout << " The ▁ given ▁ straight " << " ▁ lines ▁ are ▁ not ▁ identical " << endl ; }