在作业1的Employee和EmployeeDemo两个类基础上修改



1，重写Employee类的toString方法，返回Employee类的相关信息的字符串形式

重写Employee类的equals方法，如果两个Employee实例的名字和所属部门相同，返回true；

并在EmployeeDemo类里面验证上述两个方法



2，定义Clerk、Salesman、Engineer三个类，分别继承自Employee

为Salesman增加一个年销售额属性

为Engineer增加一个年消化人月数属性



3，将下面的描述反映到程序里

普通员工年终奖金分配方案为月薪×2

Salesman：销售额×2％+月薪×1.8

Engineer：年消化人月数×300+月薪×2.5

Clerk：月薪×2.5-1 of the Employee in the operation and EmployeeDemo two classes based on the modification 1, rewrite the Employee class toString method to return to Employee class-related information to rewrite the string form of Employee class equals method, if the two examples of Employee s name and their the same sector, return true　and EmployeeDemo the above-mentioned two types of authentication methods inside 2, the definition of Clerk, Salesman, Engineer of three categories, respectively, inherited from the Employee as a Salesman for an additional annual sales for an additional attribute for the Engineer who was the number of months to digest attribute 3, the following descr iption of the program reflects the general staff of the distribution of year-end bonus program for a monthly salary × 2Salesman: sales × 2+ monthly salary × 1.8Engineer: one year the number of months to digest × 300+ monthly salary × 2.5Clerk: monthly salary × 2.5