学生成绩管理系统，能登陆学生的各科成绩，根据需要选择班级，年级来查询成绩。可以实现增加记录、删除记录、修改记录、查询记录和显示记录等功能。-Student achievement management system that subjects the students can log results, according to need to select the class, grade to query results. Can achieve additional records, del