#include <stdio.h>

void test(val) {
	printf("testing %d\n", val);
	switch(val) {
		case 1: //case.
			printf("1\n");
		break;
		case 2: //fcase.
			printf("2\n");
		case 3: //case.
			printf("3\n");
		break;
		case 4: 
			printf("4\n");
		break;
	}
	return;
}
int main(void) {
	test(1);
	test(2);
	test(3);
}