Write a C/C++ program to create a child process. Your program should have the following components:

Display a message to indicate the start of the program

Make a system call fork() to create a child process

Use if...else if...else (or switch...case) to determine if the process is created successfully or failed. If successful, print the parent or child process and its ID (getpid() for child process, getppid() for parent) accordingly; if failed, display a message to indicate that it failed.

Before return 0 in the main, display a message to inform that the program has ended.