Automatic generation of primary arithmetic topics (C language)

This simple arithmetic is I find on the Baidu blogger called more than 53 elegant poems of a C language code, the URL is http://www.cnblogs.com/ys1101/p/4368103.html, the function is can choose subtraction simple arithmetic, judge right and wrong. I compile no bug on VS2017, because the function is only integer arithmetic, so I add the arithmetic of true score and statistic score on this basis, and finally run the program successfully. I put my source code on GitHub and the address is https://github.com/xiaofancheng/helloworld.

Automatic generation of primary arithmetic topics (C language)