/*Swap two integers.*/

#include <stdio.h>

//function prototype
void swap(int *x, int *y); 

int main(void)
{
	int x, y;
	
        printf("Please enter x and y: ");
        scanf("%d%d", &x, &y);
	
	swap(&x, &y);

	printf("main: x=%d y=%d\n", x, y);

	return 0;
}

void swap(int *x, int *y)
{
	int temp;

	temp = *y;
	*y = *x;
	*x = temp;

	printf("swap: x=%d y=%d\n", *x, *y);
}