#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;
}