Parent will spawn two child processes...
Parent is going into a wait for the children to exit...
First child process 12080 is starting up...
First child process 12080 has modified x as 1!
First child process 12080 is going into a sleep!
Second child process 2397 is starting up...
Second child process 2397 has modified x as 2!
Second child process 2397 exiting...
First child process 12080 is awake now!
The value of x is still 1.
Second child has modified a different copy of x!
First child process 12080 is exiting!
Children have exited, and parent is awake....
The value of x is still 0.
Children have modified different copies of x!
Parent exiting...