#include <unistd.h>
#include <iostream>
using namespace std;

int main() {
  cout << "My pid is: " << getpid() << "\n===========\n";
  int pid = fork();
  cout << "fork() returned: " << pid << endl
       << "My pid is: " << getpid() << endl
       << "My parent's pid is: " << getppid() << endl
       << "=======================\n";
}