//编写一个程序，设计一个图书类，包含有图书编号（唯一关键字）、书名、在架否等私有数据成员。并实现图书维护操作，包括图书记录的新增、更改、删除-//Write a program to design a class library that contains the Book Number (unique key), the title, in the fr a me member of any other private data. And to achieve the books to ma