Cоздать файл OLD.T из элементов типа char с помощью цикла repeat, признак выхода из цикла символ (!)

program Project1;
 
uses
  SysUtils;
 
var
  f: file of char;
  ch: char;
begin
  assignfile(f, 'old.t');
  rewrite(f);
  repeat
    Readln(ch);
    Write(f, ch);
  until ch = '!';
  Close(f);
  RenameFile('old.t', 'new.t');
  assignfile(f, 'new.t');
  reset(f);
  while not EOF(f) do
  begin
    Read(f, ch);
    Write(ch, ' ');
  end;
  Close(f);
  readln;
end.

procedure TForm1.MenuItem2Click(Sender: TObject);
 
  var
  f: file of char;
  ch: char;
begin
  assignfile(f, 'old.t');
  rewrite(f);
  repeat
    Readln(ch);
    Write(f, ch);
  until ch = '!';
  Close(f);
  RenameFile('old.t', 'new.t');
  assignfile(f, 'new.t');
  reset(f);
  while not EOF(f) do
  begin
    Read(f, ch);
    Write(ch, ' ');
  end;
  Close(f);
  readln;
 
end;

unit Unit1;
 
{$mode objfpc}{$H+}
 
interface
 
uses
  Classes, SysUtils, FileUtil, Forms, Controls, Graphics, Dialogs, StdCtrls;
 
type
 
  { TForm1 }
 
  TForm1 = class(TForm)
    Button1: TButton;
    procedure Button1Click(Sender: TObject);
  private
    { private declarations }
  public
    { public declarations }
  end;
 
var
  Form1: TForm1;
 
implementation
 
{$R *.lfm}
 
{ TForm1 }
 
procedure TForm1.Button1Click(Sender: TObject);
var
  f: file of char;
  ch: char;
  s: string;
begin
  s := '';
  assignfile(f, 'old.t');
  rewrite(f);
  repeat
    s := inputbox('', '', '');
    ch := s[1];
    Write(f, ch);
  until ch = '!';
  Closefile(f);
  RenameFile('old.t', 'new.t');
  assignfile(f, 'new.t');
  s := '';
  reset(f);
  while not EOF(f) do
  begin
    Read(f, ch);
    s := s + ch;
  end;
  CloseFile(f);
  ShowMessage(s);
end;
 
end.