设计一个基本的电话本管理程序，利用文件存储电话数据，具有加入、删除、显示和查询联系人电话号码的功能。在这个小型管理程序中，类与类之间通过链表将各个数据相连接，形成一个通畅的应用小程序。在程序中，对于用户需求尽可能的予以满足。-Design a basic phonebook management procedures, using document storage telephone data, has joined, delete, display and inquires the contact telephone number function. In this small management procedures, classes and class passed between each data list is connected to the application of unobstructed, forming a small programs. In the program, to the user needs to meet as possible.