用QT实现的雇员管理系统，涉及到界面和数据库 学习用很好的例子 ，代码简洁-Employees with the QT implementation management system, related to learning to use interface and a good example of the database, code clean

本系统实现了图书的增删改查功能，还有登录界面(This system implements the functions of adding and modifying books, as well as login interface)