简单的学生管理系统，统计成绩，人数，成绩排序等- Simple student management system, statistical results, the number of sorting results

家长在线注册,浏览学生成绩信息,和老师即时对话,管理学生成绩,系统公告管理-Parents online registration, browse the student achievement information, dialogue with the teacher instant and management of student achievement, system management

学生管理系统 能够统计每个学生三门功课成绩并显示； 能按学生号查询其三门学功课成绩并显示； 能浏览全部学生成绩； 能按总成绩由高到低显示学生成绩(Student management system To be able to count the three subjects of each student and show them. It can be found and displayed on the student's number. Can browse al