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

int global = 5;

int main(int argc, char **argv) {
    int local = 3;
    
    printf("before %d g=%d l=%d\n", getpid(), global, local);
    pid_t childpid = fork();
    if (childpid == 0) {
        printf("child: after %d (0), parent is %d, g=%d l=%d\n",
               getpid(), getppid(), global, local);
        global += 100;
        local += 100;
        printf("child: after %d (0), parent is %d, g=%d l=%d\n",
               getpid(), getppid(), global, local);
    } else {
        sleep(10);
        printf("parent: after %d, childpid is %d, g=%d l=%d\n",
               getpid(), childpid, global, local);
    }
}