delphi集合的用法

unit Unit4;
 
interface
 
uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, StdCtrls;
 
type
  TEnum = (One, Two, Three, Four, Five, Six, Seven, Eight, Nine, Ten);
  TSetEnum = set of TEnum;
  TForm4 = class(TForm)
    GroupBox1: TGroupBox;
    GroupBox2: TGroupBox;
    Button3: TButton;
    Button4: TButton;
    Button5: TButton;
    Button6: TButton;
    Button7: TButton;
    Button8: TButton;
    Button9: TButton;
procedure Button3Click(Sender: TObject);
    procedure Button5Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
    procedure Button7Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button8Click(Sender: TObject);
    procedure Button9Click(Sender: TObject);
  private
    SetEnum, SetEnum1, SetEnum2: TSetEnum ;
    { Private declarations }
  public
    { Public declarations }
  end;
 
var
  Form4: TForm4;
 
implementation
 
{$R *.dfm}
 //初始化
procedure TForm4.Button3Click(Sender: TObject);
begin
  SetEnum  :=  [one, Two];
  SetEnum1 := [Three, Nine, Ten]
end;
 
//集合减少
procedure TForm4.Button5Click(Sender: TObject);
begin
  SetEnum := SetEnum - [Two];
end;
 
//集合增加
procedure TForm4.Button6Click(Sender: TObject);
begin
  SetEnum := SetEnum + [Three];
end;
 
//集合减少
procedure TForm4.Button7Click(Sender: TObject);
begin
  Exclude(SetEnum, One);
end;
 
//集合增加
procedure TForm4.Button4Click(Sender: TObject);
begin
  Include(SetEnum, Four);
  Include(SetEnum, Ten);
end;
 
//执行校验
procedure TForm4.Button8Click(Sender: TObject);
begin
  if One in SetEnum then
  begin
    ShowMessage('Exclude函数执行失败');
  end
  else if Two in SetEnum then
  begin
    ShowMessage('SetEnum - [Two]执行失败');
  end
  else if not (Three in SetEnum) then
  begin
    ShowMessage('SetEnum + [Three]执行失败');
  end
  else if not (Four in SetEnum) then
  begin
    ShowMessage('Include函数执行失败');
  end
 
  else if not (ten in SetEnum) then
  begin
    ShowMessage('Include函数执行失败');
  end
  else
  begin
    ShowMessage('执行成功！');
  end;
end;
 
//取得集合的交集
procedure TForm4.Button9Click(Sender: TObject);
begin
  SetEnum2 := SetEnum1 * SetEnum;
  if Three in SetEnum2 then
  begin
    ShowMessage('交集成功执行成功');
  end;
end;
 
end.