#include <unistd.h>
#include <sys/types.h>
#include <errno.h>
#include <stdio.h>
#include <sys/wait.h>
#include <stdlib.h>

int main ()
{
  pid_t child_pid;
  child_pid = fork ();
  if (child_pid > 0) 
    {
      printf("\n Child process %d about to sleep for 20 s \n",child_pid);
      sleep (20);
    }
  else 
    {
      printf("\n Parent process about to exit\n");
      exit (0);
    }
  return 0;
}