1修改学号|2修改姓名|3修改性别|4修改手机号|5修改宿舍电话号|6修改数学成绩|7修改C++成绩|8退出-1 Modify the student number the | Edit name | 3 Modify gender modify the phone number | modify dormitory phone number | modify math scores | 7 modify C++ results | 8 exit