c语言版通讯录（数据结构：链表）实现的功能有增加、删除、修改、查询等，功能比较基本，有兴趣的同学可以修饰修饰。-c language version of Address Book (data structure: List) to achieve the function to add, delete, modify, query and so on, the basic functions, interested students can be modified modified.