只能整数运算的VC++小计算器，只能算加减乘除，然后出结果，而且是整数运算，够简单吧，因此来说，对学习VC的新手来说更有用，复杂的代码新手不一定能看得懂-Only integer arithmetic of the VC++ small calculator, can only be considered addition, subtraction, and then the results, and is integer arithmetic, simple enough right, so