说明：  一个自己写的完全用C语言做的管理系统，用到了链表、结构体、读写文件，字符界面简洁美观，查找、插入、删除、添加、创建、统计、修改、保存、读取等功能全面。
(Write a complete C language to do with the management system, use the list, structure, reading and writing files, character interface is simple and beautiful, find, insert, delete, add, create, statistics, modify, save, Du Qudeng full-featured .)