一个学生管理系统，上个学期的实训作业，配合MySQL数据库使用。实现了教师/学生的注册、登录，各自信息的修改、教师账号对学生成绩信息的增删改查排（包括按学号、姓名的查找，按总分/但科目的成绩升/降序的排序）(A student management system, last semester's training work, in conjunction with the MySQL database. The registration and login of teachers and students, the modification of their information, and the additions and deletions of teachers' accounts to student achievement information are implemented.)