设计一个通讯录管理系统，要求系统实现通讯录管理的各项要求操作。管理者使用该系统可以输入姓名、电话等通讯信息，可以对通讯录进行添加、删除，并通过各种条件进行查询，最后将通讯录保存到文件中。-Design a contacts management system, address book management system implementation requirements with the requirements of operation. Managers use the system can enter the name, telephone communication and information, you can be added to the Address Book, delete, and query through a variety of conditions, and finally contacts saved to the file.