简易的数字计算器设计，简单的c++实现，c++课程习题解答。比电脑自带的计算器可能功能没那么强大，但是本人自编的，有成就感。只是可能太简单了。-Simple digital calculator designed to achieve a simple c++, c++ programs exercises answer. Than a computer may function calculator that comes with less powerful, but my self, and