编写一个程序用于中学生和小学生的管理。中学生包括编号、姓名、性别、班号、英语、数学、语文、生物四门课的成绩的输入输出和求平均值；小学生包括编号、姓名、性别、班号、数学和语文两门课的成绩的输入输出和求平均值。

提示：设计一个person类、一个middleStudent类和一个primaryStudent类。

-Writing a program for middle school students and primary school students. Middle school students include input and output of the number, name, gender, number, English, math, Chinese, biology four door course grades and averaging　pupils including number, name, gender, number, math and Chinese two classes of results of input and output, and calculate the average value.

Tip: design a person class, a middleStudent class, and an primaryStudent class.