实现图书信息管理系统的添加删除创建等功能-To achieve library information management system add and delete to create functions

本文件为《好学的c++》书上的全书源程序,可供读者学习借鉴。但是上传时不允许有中文名称所以改正了，请站长明鉴，谢谢！-This document is the source for the book " studious c++" book, for readers to learn from. But when you are not allowed to upload Chinese name so corrected, please head Ming-jian, tha