问题的提出：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。-Of the problem: write a small company payroll system. The company mainly four categories of staff: managers, part-time technical staff, sales staff and sales manager. Store and display the number of each type of personnel (from 100 from the number), name, and a monthly salary, and gives each type of object is created the constructor execution order (with a monthly salary calculated as follows: the manager of a fixed monthly salary of 8000 yuan, part-time technical staff 100 yuan/hour, the salesman of the month 4　of sales, sales manager keep base wage of 5000 yuan plus 5　of the sales of their administration department), with virtual functions.