说明：  试设计一个学生信息管理系统，使之能提供以下功能：1）系统以菜单方式工作；2）学生信息录入功能（学生信息用文件保存）；3）学生信息浏览功能；4）查询、排序功能（按学号查询或按姓名查询）；5）学生信息的删除与修改功能。
(Try to design a student information management system to provide the following functions: 1) the system works by menu; 2) student information entry function (student information is saved with files); 3) student information browsing function; 4) query, sort function (according to school number query or surname name); 5) student information deletion and repair. Change the function.)