unit3.pas

来自「设计模式delphi版给想学delphi的朋友一个很有价值的参考」· PAS 代码 · 共 38 行

unit Unit3;

interface

uses
  Windows, Messages, SysUtils, Classes, Graphics, Controls, Forms, Dialogs,
  StdCtrls;

type
  TForm3 = class(TForm)
    Label1: TLabel;
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form3: TForm3;

implementation

uses VisitorUnit2;

{$R *.DFM}

procedure TForm3.Button1Click(Sender: TObject);
var
  componment: TEquipment;
  visitor: TInventoryVisitor;
begin
  componment := TEquipment.create('Computer');
  visitor := TInventoryVisitor.Create;

  componment.Accept(visitor);
  Label1.Caption := componment.name + '畐