thrdu.pas

《Delphi开发人员指南》配书原码

unit ThrdU;

interface

uses
  Classes;

type
  TTestThread = class(TThread)
  private
    Answer: integer;
  protected
    procedure GiveAnswer;
    procedure Execute; override;
  end;

implementation

uses SysUtils, Main;

{ TTestThread }

procedure TTestThread.GiveAnswer;
begin
  MainForm.Edit1.Text := InttoStr(Answer);
end;

procedure TTestThread.Execute;
var
  I: Integer;
begin
  FreeOnTerminate := True;
  for I := 1 to 2000000 do
  begin
    if Terminated then Break;
    Inc(Answer, Round(Abs(Sin(Sqrt(I)))));
    Synchronize(GiveAnswer);
  end;
end;

end.