大学人员类的设计

（1）　　基类，person类，相关的属性自己定义

（2）　　派生类，student类，teacher类，相关的属性自己定义

（3）　　Student类和teacher类的属性不相同，利用多态性编辑show函数，可以输出不同类正确的信息。

（4）　　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 personnel class design (1) base class, person type, the attributes related to their definition (2), derived class, student class, teacher class, their own definition of the relevant property (3) Student class and the teacher is not the same class of property, the use of show polymorphism editing function, can output different types of correct information. (4) editing interface, the function (1) entry personnel (2) to remove personnel (3) save the staff (4) Enquiries staff