学生档案通讯录管理系统,用C++双向循环链表编写,支持信息保存,从文件载入,信息录入,信息添加删除,信息排序,信息修改等功能-Student file address book management system, written in C++ two-way circular linked list, support information is saved and loaded from the file, information input, information is added to delete, sort of information, information to modify functions