（１）　　编写程序，对实验12增加教师类（包括教师编号、教师姓名、年龄）；

（２）　　编写程序，实现教师类的年龄增加（学生类也有年龄增加，且性质相同，所以应该把这部分抽象到一个父类中，如：人类）；

（３）　　编写程序，实现每实例化一个人（无论是老师类对象，还是学生类对象）都打印有多少人；

-(1) write a program to test 12 increase class teachers (including teachers no., name, age)



(2) write a program, the realization of teachers　class of increasing age (student class also with increasing age, and same properties, so you should put this part of the abstract in a parent class, such as humans)

(3) write a program, the realization of each instantiation of a person class object (whether the teacher class object, or students) how many people are there in all print