本程序使用ＶＣ.net来实现一个计算器功能，用来实现简单的四则混合运算，可以作为一个课程设计来使用。-VC.net the procedures used to achieve a calculator function, to achieve a simple four mixed computing, as a curriculum design to use it.

自己写的一个简单的计算器程序。便于初学者学习C++类的设计，vc基于对话框控件设计等内容-himself wrote a simple computer program. Beginners learning to facilitate the design category C, vc-based dialog design content controls

这是一个基于VC++的登录窗口 ，使用简单工厂的设计模式实现计算器功能，要求：功能的增加对原有代码作最少改动-This is based VC++ login window using simple factory design pattern calculator function requirements: the increase of the functionality of the original code for minimalist