职工信息包括职工号、姓名、性别、年龄、学历、工资、住址、电话等（职工号不重复）。试设计一职工信息管理系统，使之能提供以下功能：-Information including the number of workers union, name, sex, age, education, salary, address, telephone etc. (number of workers of non repetition). Try to design a staff information man