利用VC++的MFC设计简单计算机，能够实现加减乘除，初学者可以参考自己设计，里面包含的设计源代码和算法，其实很简单，就是调用几个简单函数。-Using vc++ MFC design simple computer, and can realize addition, subtraction, multiplication, and division, beginners can refer to own design includes the design of the source cod