此程序是模拟手机中通讯录而写出的,有以下功能：（1）通讯录链表的建立 （2）通讯者结点的插入、查询、删除、输出（3）退出管理系统 -This process is simulated in the mobile phone address book and write, and has the following features: [1] set up the address book list [2] communication