说明：  c语言编写的小霸王学习机界面，一个小车的游戏，给出简单加减运算，用户输入结果，正确并给出评判小车前进一步。（本代码是在win—tc写的，在visual c++里边运行要将getch()去掉。）
(c language learning machine interface written Sundance Kid, a car game, give a simple addition and subtraction, the results of user input, and gives judges the right car forward. (This code is written in the win-tc in visual c++ to run inside to getch () removed.))