Question

how to print the current process state

main ()
{
  pid_t pid;
  printf("parent : %d\n", getpid());
  pid = fork();
  if (pid == 0)
    {
      printf("child : %d\n", getpid());
      sleep(2);
      printf("child exit\n");
      exit(1);
    }
  while (1)
    { /*after the child exit, its a zombie process */
      system("clear");
      system("ps -x | grep t"); /* if a.out is Z means zombie process */
      sleep(8);
    }
}

Is there any other method or way to view the current process state in output
itself..?

Answer 1

Determining the scheduling state of a process is OS specific. On Linux, top and similar read it from the third field in /proc/$PID/stat.