大学人员类的设计

基类，person类，相关的属性自己定义

派生类，student类，teacher类，相关的属性自己定义

Student类和teacher类的属性不相同，利用多态性编辑show函数，可以输出

同类正确的信息。

编辑界面，功能有（1）输入人员（2）删除人员（3）保存人员（4）查询人员

-University staff design the base class type, person type, the attributes related to their own definition of derived classes, student class, teacher class-related attributes defined in the Student class and their teacher is not the same class of property, use the show function polymorphism editor, can output the right kind of information. Editing interface, the function (1) entry personnel (2) remove people (3) to save staff (4) inquiry officer