本课程设计用C++实现一个简单计算器。其类似于Windows附件中自带的计算器。这个计算器不仅实现了简单的四则运算功能，还实现了高级的科学计算功能，而且具有简洁大方的图文外观。-The course is designed in C++ to implement a simple calculator. Its similar to the attachment that comes with Windows calculator. This calculator not only to ach