#include <unistd.h>
#include <stdio.h>

#define printv(x) printf("%s = %d\n", (#x), (x))

int main(void)
{
	int f1, f2, f3;
	f1 = fork();
	printv(f1);
	f2 = fork();
	printv(f2);
	f3 = fork();
	printv(f3);

	printf(" all => %d, %d, %d\n", f1, f2, f3);
}