Example Game Play

$ ./guess
Welcome to the Guessing Game.
What is your guess?
9110
Your guess of 9110 is too low.
What is your guess?
9120
Your guess of 9120 is too high.
What is your guess?
9115
Your guess of 9115 is too high.
What is your guess?
9113
Your guess of 9113 is correct.
$