Default schema in a model-view-presenter pattern design.

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

有助于设计模式学习的CodeProjects-Help design pattern learning CodeProjects