[friz]

что-то такое... на форме 3 кнопки и 3 едита

Код:

unit Unit1;

interface

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

type
  TForm1 = class(TForm)
    Button1: TButton;
    Edit1: TEdit;
    Edit2: TEdit;
    Edit3: TEdit;
    Button2: TButton;
    Button3: TButton;
  
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure FormCreate(Sender: TObject);
    procedure Button3Click(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

  Tstruk = record
     ed1:string[20];
     ed2: string[20];
     ed3: string[20];
  end;
var
  Form1: TForm1;
  i,n:integer;
implementation

{$R *.dfm}


procedure TForm1.Button1Click(Sender: TObject);
var f:file of Tstruk;

    s:Tstruk;
begin
 assignfile(f,'f.zu');
 reset(f);
 s.ed1:=edit1.Text;
 s.ed2:=edit2.Text;
 s.ed3:=edit3.Text;
 write(f,s);
 closefile(f);
end;

procedure TForm1.Button2Click(Sender: TObject);
var f:file of Tstruk;

    s:Tstruk;
begin
 assignfile(f,'f.zu');

 reset(f);

 n:=filesize(f);
 inc(i);
 if i>n then i:=1;
 seek(f,i);

 read(f,s);

 edit1.Text:=s.ed1;
 edit2.Text:=s.ed2;
 edit3.Text:=s.ed3;
 closefile(f);
end;

procedure TForm1.FormCreate(Sender: TObject);
begin
n:=0;
i:=0;
end;

procedure TForm1.Button3Click(Sender: TObject);
var f:file of Tstruk;
begin
 assignfile(f,'f.zu');
 rewrite(f);
 closefile(f);
end;

end.