编写三个类，图书类、学生类和测试类，可以处理简单的书籍借阅情况，包括借书和还书等。图书类的数据成员包括书名、书号和借书学生等；方法包括借书、还书和显示书籍信息等。学生类的数据成员包括姓名、学号和所借书籍等；方法包括显示学生信息等。测试类是一个应用程序，在该程序中创建图书类和学生类对象，完成图书的借阅和归还。

-The preparation of three classes, books, classes, student class and test class to handle simple lending library, including borrowing and returning books and so on. Class data members, including book title, ISBN, and library students, etc.　methods, including borrowing, but also books and display books and information. Class data members, including student name, student number, and the borrowed books　methods include the students display information. Test class is an application to create books in the program class object classes and students to complete and return books to borrow.