使用QT写计算器时的代码文档，详细的介绍了该项目的规划和具体功能的逻辑实现，并有相应的图示进行说明。-When using QT write a calculator code documentation, detailed introduces the project planning and implementation of the specific function logic, and a corresponding icon.

基于QT的软件自动更新解决放案，并附有主要的实现代码，亲测可运行-QT-based software automatic update solution with the main implementation code, pro-test run