说明：  （1）设计一个“图书管理系统”，主要实现图书信息即图书的分类、书名、作者名等的录入、查询、添加、修改、删除、排序和保存等基本功能。 （2）用顺序表存储信息，实现动态管理。 （3）将操作结果保存到外部文件。
((1) Designing a "book management system", which mainly realizes the basic functions of book information, such as the classification of books, the title of books and the name of authors, such as input, inquiry, addition, modification, deletion, sorting and preservation. (2) Store information in order table to realize dynamic management. (3) To save the operation results to external files.)