unit fStudentVO;interfaceuses SysUtils;type
   TStudentVO = class;
    private
           studentID:string;
           studentName:string;
           birthday:string;
    public
           function getStudentID:string;
           procedure setStudentID(aStudentID:string);
   end;
   
implementation
           function TStudentVO.getStudentID():string;
             begin
               Result := studentID;
             end;           function TStudentVO.setStudentID(aStudentID:string);
             begin
                if studentid<> astudentid then
                   studentID := aStudentID;
             end;end.