 class Student
     {
         int stu_code;                        //ѧ
         String stu_name;                    //ѧ
         String deptName;                   //Ժϵ
         
         int getStudentCode()                //ȡǰѧ
         {
             return stu_code;               //صǰѧ
         }
         void setStudentCode(int studentCode)     //ѧ
         {
             if(studentCode > 0)
             {
                 stu_code = studentCode;       //޸studentCode
                 return true;                 //true޸ѧųɹ
              }
              else
              {
                  return false;               //false޸ѧŲɹ
              }
         }
