课授练习：名称：图书销售管理软件平台；功能：运用类和对象概念编写图书管理销售平台，继承了数组的搜索与调用；目的：可用于基本教学演示，讲解面向对象的基本内涵-Lesson grant Exercise: Name: Book sales management software platform function: the use of the concept of classes and objects to write library management sales platform, in