Program is to swap the two values which are enter by user:

Program is to swap the two values which are enter by user through the function with values changed using pointers

void swap(int *p,int *q);

void main()

 {

 clrscr();

 int a,b;

 cout<<" enter the number ";

 cin>>a;

 cout<<" enter the number ";

 cin>>b;

 swap(&a,&b);

 cout<<" the numbers after the value being changed "<<"\n"<

 }

void swap(int *p,int *q)

 {

  int r;

   r=*p;

  *p=*q;

  *q=r;

 }