//============================================================================
// Name        : Fork.cpp
// Author      : Jim Fawcett
// Version     :
// Copyright   : copyright 2012
// Description : Hello World in C++, Ansi-style
//============================================================================

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

int glob = 6;  // initialized global variable

int main()
{
  int var;  // uninitialized variable on stack
  pid_t pid;
  cout << "\n  before fork";
  if((pid = fork()) < 0)
  {
	cout << "\n  fork error";
  }
  else if(pid == 0)
  {
	// child gets a copy of parents process
	// won't change parents data

	cout << "\n  in child process:";
    glob++;
    var++;
  }
  else
  {
	cout << "\n  in parent process";
	sleep(2);	// parent
  }
	cout << "\n  pid = " << getpid()
		 << ", glob = " << glob
		 << ", var = " << var << "\n\n";
	return 0;
}