unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);
var f,g:TextFile;
begin
AssignFile(f,'text.in');
AssignFile(g,'text.out');
Append(f);
Reset(g);
readln(f);
Writeln(g,f);
CloseFile(f);
CloseFile(g);
end;

end.