#include <stdio.h>

int a;

void func(void) {
	int b;

	a = 3;
	b = 4;
}

int main(void) {
	int b;

	a = 1;
	b = 2;
	printf("%d\n", a);
	printf("%d\n", b);
	func();
	printf("%d\n", a);
	printf("%d\n", b);

	return 0;
}