自己编写的一个基于MFC的计算器，包括常用的运算，加减乘除和开方，以及系统的实施的时间显示，本人亲测，能正常在win7下运行，XP应该没问题-An MFC-based calculators, including the implementation of common arithmetic, addition, subtraction and prescribing, as well as the system' s time to write your own show, I pro-