学生成绩管理，能够进行：创建学生资料、查询学生成绩、删除学生资料、追加学生资料、显示学生成绩、统计学生成绩、成绩排序、将学生资料保存到文件。-Student performance management, capable of: Creating student data, query student achievement, delete student information, additional student data to show student achievement, stud