vc6.0写的一个mfc的计算器程序，带浮点数，自己简单测了一下跟Windows自带的计算器要求基本一致，欢迎同学们拿去参考。-Vc6.0 written by one of the MFC calculator program, with floating-point number, a simple measure with Windows calculator attached request basic consistent, welcome students take referenc