本系统是图书管理系统，其具有登录管理、图书查询、借出归还书籍、入库删除书籍等功能。那么从这些基本功能出发，本系统分成四大模块：系统管理模块、书籍数据管理模块、读者数据管理模块、借还系统模块。-This system is a library management system, which has a login management, book search, return books borrowed, warehousing delete books and other functions

设计一个通讯录，可以实现输入、显示、查找、删除、插入、保存、读入、按序号查找、拷贝等功能。-Design a book, you can achieve input, display, search, delete, insert, save, read, by serial number to find, copy and other functions.