c++和SQL做的一个小型通讯录管理系统-c++ and SQL to do a small address book management system

通讯录管理系统由于该系统多处需要连接数据库然后执行SQL命令，为了提高代码的重用率，减少代码冗余，-Address book management systemBecause the system needs to connect to the and the SQL command, in order to improve the code reuse rate, reduce the code redundancy,