说明：  图书管理 1，输入形式和输入值的范围：图书通过输入书号，书名，著者，总存量来建立一棵B-树，书号，现存量和总存量采用int 型 ，书名，著者采用20位字符串形式定义 借阅者通过输入书号，图书证号来借阅书籍，建立一条借阅者的链表来记录借阅情况 图书证号是20位的字符串 2. 输出的形式：Ｂ-树以凹入表形式显示出来，借阅者以借阅图书证号、所借图书的内容、借阅日期显示出来 3. 本程序实现对一本书的采编入库，清除库存，借阅和归还,初步实现图书管理
( The books manage 1, the input form and the input value scope: The books through the input book number, the book title, the author, the total storage quantity establish a B- tree, the book number, 鐜板瓨閲?and the total storage quantity uses int, the book title, the author uses 20 characters strings form definition borrowing through the input book number, the books card number borrows the books, establishes a borrowing chain table to record borrows the situation books card number is 20 characters strings 2. outputs forms: The B- tree indents the table form to demonstrate, borrowing borrows the books card number, borrows the books the content, borrows the date to demonstrate 3. this procedure realization picks to a book enrolls the storehouse, eliminates the stock, borrows and returns, initially realizes the books to manage )