说明：  设计一下公司员工系统(彻底弄明白) 员工分为: Sells销售人员 编号,姓名,工资,提成 Admin管理人员 编号,姓名,工资,职务 Tech技术人员 编号,姓名,工资,项目组 Department 行政人员 编号,姓名,工资 行为: 可以放入Test类,也可以写在员工类中,自己选择 计算年收入(方法) 招聘员工(方法get set) (类/对象/属性/方法/构造/重写/封装/继承/多态)
(Designed to look at employees system (the complete figure out) Staff are divided into: Sells sales staff number, name, salary, commission Admin management personnel number, name, salary, duties Tech technical staff number, name, salary, the project team Department administrative staff numbers, name, the wage behavior: can be placed in Test class can also be written in the employee category, calculation of annual income of their choice (method) recruitment of staff (Method get set) (class/object/attribute/method/constructor/rewrite/package/Inheritance/polymorphism))