说明： 一个通讯录管理系统,分为录入、查询、修改、删除、退出几部分。
先将通讯录中的资料读入结构体变量中,以便查询等操作
录入名字、地址、电话、电子邮箱、QQ号码 (An address book management system, is divided into input, query, modify, delete, withdraw from the several parts. First reading of the address book information into the structure variables in order to query such as the operation input name, address, telephone number, e-mail, QQ numbers)
