Introduction - If you have any usage issues, please Google them yourself
A simple menu program, run-time "Menu: A (dd) M (inus) Mu (ltify) D (ivid) Q (uit), select one" prompts the user. A representative of the addition of M on behalf of subtraction, Mu represents multiplication, D stands for division, when the user to enter one of two random number and the corresponding arithmetic operations. So the cycle until the Q-input, the end of the process.