#include <stdio.h>

void csere(int x, int y)
{
	int tmp;
	tmp = x;
	x   = y;
	y   = tmp;
}

int main()
{
	int x = 3, y = 4;
	printf("A fuggveny elott: x = %d, y = %d\n", x, y);
	csere(x,y);
	printf("A fuggveny utan: x = %d, y = %d\n", x, y);
	return 0;
}