该程序能实现对一本书进行采编入库、清除库存、借阅图书、归还图书且记录借书的用户信息，还有查找书、显示图书目录的功能，并且以该书的书号为关键字建立一个B_树。-The program can realize editing storage of a book to clear inventory, borrow books, return books and records library of user information, as well as look for a book to show the functionality of the library catalog, and the book' s ISBN keyword a B_ Tree.