#include <stdio.h>
int y;

void f1(void)
{	
	int x = 1;
	y = x;
}

void f2(void)
{	
	int x;
	y = x;
}

void test()
{
	f1();
	if (y)
		printf("f1 set y to %d\n", y);
	f2();
	if (y)
		printf("f2 set y to %d\n", y);
}

main()
{
	char buf[16 * 1024];
	test();
}