/* lab 3 D : o means orphan and z means zombie */
#include <stdio.h>
#include <stdlib.h>

int main(int argc, char *argv[]) {
int pid;

  pid = fork();
  if (pid < 0) { /* an error occurred */
     printf("Fork Failed\n");
     exit(1);
  } else if (pid == 0) { /* child process */
     if (argv[1][0] == 'o') sleep(30); /* child still executing when parent terminates */
     printf("Child completed\n");
     exit(0);
  } else { /* parent process */
     /* parent does not wait for child */
     if (argv[1][0] == 'z') sleep(30); /* child completes before parent */
     printf("Parent completed\n");
     exit(0);
  }
}