学生证管理系统。通过学号，进行学生信息录入查询。通过班号进行学生信息查询。 修改学生各项信息删除学生信息，统计各学院人数，统计各班级人数-The student ID card management system. By student number, student information into the query. Student information queries by class number. Modify students the delete student infor