实现一个简易的图书管理系统，至少包括三项功能：图书管理（录入、更新、删除书目）、读者管理（新增读者、更新读者信息、删除读者、读者查询自己借阅情况）和借还书（查询书目、借书、还书）。系统操作界面及数据存储形式不限。-Implement a simple library management system, including at least three functions: library management (entry, update, delete bibliography), the reader management (new readers, readers updated information, delete the reader, the reader check their loan situation) and borrow books ( Query bibliography, library, books). System interface and data storage in the form of limitation.