通讯录，可以增加删除记录，还有查询记录,还可以显示数据-communication lis

KTV项目，实现了最基本的增删改查的功能，其项目包括前后台。运用的是Visual Studio的开发工具-Mainly using c++, the front desk background have the source code. Achieved at the very least, add and delete