?? unit1.pas
字號:
unit Unit1;
interface
uses
Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, ExtCtrls, StdCtrls;
type
TForm1 = class(TForm)
Timer1: TTimer;
Edit1: TEdit;
Button1: TButton;
Button2: TButton;
Timer2: TTimer;
procedure Timer1Timer(Sender: TObject);
procedure Button1Click(Sender: TObject);
procedure Button2Click(Sender: TObject);
procedure Timer2Timer(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;
var
Form1: TForm1;
x:DOUBLE;
implementation
{$R *.dfm}
procedure TForm1.Timer1Timer(Sender: TObject);
begin
x:=strToFloat(Edit1.Text);
begin
if x> 0 then
x:=x-1;
Edit1.Text := CurrToStr(x);
end;
end;
procedure TForm1.Button1Click(Sender: TObject);
begin
Timer1.Enabled:=True;
end;
procedure TForm1.Button2Click(Sender: TObject);
begin
Timer1.Enabled:=false;
end;
procedure TForm1.Timer2Timer(Sender: TObject);
begin
if (Edit1.text<='0') and (Edit1.text<>'') then
begin
Timer1.Enabled:=False;
Edit1.Text:='時間到'; MessageBeep(0);
end;
end;
end.
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