#include void f() { int c = 0; printf("c=%lu\n", (unsigned long)&c); } int main(int argc, char *argv[]) { //~ printf("%lu\n", sizeof(long)); int a = 0; int pid = fork(); printf("pid=%d\n", pid); printf("a=%lu\n", (unsigned long)&a); int b = 0; printf("b=%lu\n", (unsigned long)&b); f(); return 0; }