program to swap the value by call by refrence..

#include<stdio.h>

int swap(int*,int*); //functon decleretion

void main()

{

int a,b;

clrscr();

printf("Enter two values");

scanf("%d%d",&a,&b);

swap(&a,&b);

printf("%d %d",a,b);

getch();

}

// function definition swap

int swap(int *p,int *q)

{

int t;

t=*p;

*p=*q;

*q=t;

}