用VC写的电话计费管理系统，界面采用MFC来实现，采用B/S架构。里面有一点瑕疵，希望大家指点指点。-VC write telephone billing management system, the interface uses MFC to achieve, the use of B/S structure. There are some flaws, I hope you pointing pointing.

爱尔兰B公式的计算器，可以给定任意a，s，B中的2个，计算另一个，MFC-Ireland B formula calculator, you can determine the arbitrary a, s, B in two, another calculation, MFC