定义一个学生类，要求存储学号，姓名, 年龄，性别，班号等信息，并作为私有成员变量存储，分别实现GetInfo(...), PrintInfo, SetInfo(...) 三个共有成员函数，用于进行信息读取、信息打印、信息修改。-Define a class of students, requiring storage student number, name, age, gender, class, and other information, and as private member variables are stored, respectively, to achieve GetInfo (...), PrintInfo, SetInfo (...) function of the three Total members , used for information reading, information printed, information changes.