libraryms

代码说明：

  功能简介：用户管理：添加用户，修改密码，注销用户 图书管理：增加图书，修改图书，删除图书，查询图书 借书证管理：办理借书证，修改借书证，挂失借书证，查询借书证 借阅与归还：借阅图书，归还图书，查询借阅与归还情况 借书证管理：办理借书证，修改借书证，挂失借书证，查询借书证 借阅与归还：借阅图书，归还图书，查询借阅与归还情况 (Features: User management: add users, change passwords, log off the user library management: increasing Books, modify books, remove the books, check books library card management: for a library card, library card changes, report the loss of library card, library card to borrow and return query : to borrow books, return books, check library card to borrow and return management of the situation: for a library card, library card changes, report the loss of library card, library card to borrow and return the query: to borrow books and return books to borrow and return the case query)