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

int main()
{ int p;
  printf("%d started\n", getpid());
  fflush(stdout);

  p = fork();
  printf("%d after first fork p = %d\n", getpid(), p);
  fflush(stdout);

  p = fork();
  printf("%d after second fork p = %d\n", getpid(), p);
  fflush(stdout);

  p = fork();
  printf("%d after third fork p = %d\n", getpid(), p);
  fflush(stdout);

  printf("%d finished\n", getpid());
  fflush(stdout); }