#include<iostream.h>
#include<conio.h>
int main()
{
clrscr();
int a, b ;
void swap (int *, int *) ;
a = 10;
b = 20;
cout<<"Value of a before function call : "<<a<<endl;
cout<<"Value of b before function call : "<<b<<endl;
swap( &a , &b );
cout<<"Value of a after function call : "<<a<<endl;
cout<<"Value of b after function call : "<<b<<endl;
getch();
return 0;
}
void swap(int *x, int *y )
{
int temp;
temp = *x;
*x = *y;
*y = temp;
cout<<"Value of a during function : "<<*x<<endl;
cout<<"Value of b during function : "<<*y<<endl;
}