某小型公司，主要有四类人员：经理、兼职技术人员、销售经理和兼职推销员。

现在，需要存储这些人员的姓名、编号、级别、当月薪水，计算月薪总额并显示全部

信息。

-A small company, there are four categories of personnel: managers, part-time technical staff, sales manager and part-time salesman. Now, you need to store the name, number, level, monthly salary, calculate the total monthly salary and display all the information.