编写程序用静态成员的方法实现对班费的管理，要求定义一个类Student，除了声明一个存放班费的静态成员，还要分别定义一个上交班费的成员函数Contribute（），花费班费的成员函数Spend（）和显示班费的静态成员函数Display（）-Write a program with static member class fee management, require the definition of a class Student, stored in addition to declare a static member of the class fee, but also define a member function of a shift fee Contribute (), a member of the spending class fee spend () function and display class fee static member function display ()