说明：  这是我在大一时编的，当时我只学习C++半年，当然了，代码很粗糙，希望大家能帮助我做的更好，多多提意见。希望对您有点帮助！
(This is my one o'clock in the series, I had only half a year learning C, of course, the code was rough, hope that we can help me do better, more opinions. You want a bit of help!)