20102121523512

代码说明：

说明：  这是一个通讯录！主要实现多用户登录，多权限管理！增加、删除、修改记录和用户！你可以和 其他用户发送消息，当他登录时第一时间通知你！这个做的不怎么好！没有加太多的功能，也没有美化界面！由于初学，一切都是那么陌生！我会努力的！谢谢！ (This is a book! Major multi-user login, rights management and more! Add, delete, modify records and users! You can send messages to other users, and when he logged the first time to notify you! This very well done! Do not add too many features, there is no landscaping interface! As beginners, everything is so strange! I will try it! Thank you!)