综合程序设计

代码说明：

  设计一个学生成绩管理系统，实现添加记录、显示记录、修改记录、删除记录、查找记录、排序记录及退出系统等功能。(The design of a student achievement management system, to add records, display records, modify records, delete records, find records, sorting records and exit systems and other functions.)