编写师生互动系统，老师登录可查询学生信息，录入成绩，布置作业，与学生互动，发布公告。学生登录可以查询个人信息，查询成绩，提交作业，联系老师。-It is a teacher-student interaction system.Teachers can check students information, entry grades, assign homework, interact with students and make announcements. Students can acce