编写一个小公司的工资管理系统。该公司主要有4类人员：经理、兼职技术人员、销售员和销售经理。要求存储并显示每类人员的编号（从100起编号）、姓名和月薪，同时给出在创建每一类对象时构造函数的执行顺序（月薪计算方法为：经理固定月薪8000元，兼职技术人员100元/小时，销售员为当月销售额的4％，销售经理保底工资5000元另加其所管部门销售额的5％），要求用虚函数实现。-Write a small company payroll management system. The company has four main categories of staff: manager, part-time technicians, salespeople and sales managers. Storage and display requirements for each type of number (from 100 onwards number), name and salary, and gives staff when creating each type of object constructor execution order (monthly salary is calculated as: manager fixed monthly salary of 8,000 yuan, a part-time technical staff 100 yuan/hour, the salesman of the month at 4　of sales, sales manager Paul at the end of wages 5,000 yuan plus 5　of sales in the possession department), asked to use virtual functions.