/* Exercise 4.14 from "The C programming language" book by K&R */

#include<stdio.h> 

#define swap(t,x,y) {t c; c = x; x = y; y = c;}

main(void)
{
	int a, b;
	a = 1;
	b = 2;
	swap(int, a, b);
	printf("%d %d\n", a, b);
	return 0;
}