/* Function swap(&a,&b) to swap the values of two variables. */

#include <stdio.h>

void swap(int *num1, int *num2);

main()
{
	int a=5, b=7;
        swap(&a,&b);
        printf("%d %d\n",a,b);
}

void swap(int *p, int *q)
{
	int temp;
	temp = *p;
	*p = *q;
	*q = temp;
}