text: #include<stdio.h>
  
  void swap(int *a,int *b){
      int temp;
      temp=*a;
      *a=*b;
      *b=temp;
  }
  
  int main(){
      int a = 10;
      int *ip;
      ip = &a; 
      printf("%p\n", &a);
      printf("%p\n", *ip);
      printf("%p\n\n", ip);
  
      int b = 20;
      int *ip2;
      ip2 = &b;
      printf("%p, %d\n", ip2, *ip2);
      printf("%x\n", ip2>ip);
      ip2 ++;
      printf("%p, %d\n\n", ip2, *ip2);
  
      int c,d;
      c=1;
      d=2;
      swap(&c, &d);
      printf("%d,%d",c,d);
  }