学生成绩管理系统，输入学号、姓名及总成绩，可选择排序方法及升降方式，可以对某位学生信息进行修改，以学号为关键字进行查询等多种功能。-Student performance management system, enter the student number, name and total score, you can choose methods and means of lowering sort, you can modify the information on a student to student number for the keyword query and other functions.