学生选课系统\AddC.java
............\AddSC.java
............\Addstu.java
............\DelC.java
............\DelSC.java
............\Delstu.java
............\Menu.java
............\SelC.java
............\SelSC.java
............\Selstu.java
............\student.mdf
............\Students.java
............\student_log.ldf
............\Updatastu.java
............\UpdateC.java
............\UpdateSC.java
............\User.java
学生选课系统