vc中用MFC编辑一个科学计算器，高精度，计算速度高，-vc MFC used to edit a scientific calculator, high accuracy, high calculation speed,

VC++基于mfc 实现对话框打开读取txt文件，显示在edit box 中，一个简单的MFC小例子，相信有不少朋友需要这个吧。-VC++ based mfc achieve read txt file open dialog box is displayed in the edit box, and a simple MFC small example, I believe many of my friends needed this.