/* http://vip.cs.utsa.edu/usp/  dr.robbins utsa computer science  "unix systems programming" */
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>

int main(void) {
   int x;
   pid_t pid;
   x = 0;
   printf("before fork: I am process %ld and my x is %d\n", (long)getpid(), x);
   pid = fork();

   x = 1;
	if (pid > 0) { 
		printf("after fork: I am process %ld and my x is %d\n", (long)getpid(), x);
		wait(pid);
	}
	if (pid == 0) { 
		printf("I am process %ld and my x is %d\n", (long)getpid(), x);
		sleep(10);
	}
   return 0;
}