unit Unit1;

interface

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

type
  TVetvlenie4 = class(TForm)
    ae: TEdit;
    b: TEdit;
    Label1: TLabel;
    Label2: TLabel;
    Memo: TMemo;
    MainMenu1: TMainMenu;
    N1: TMenuItem;
    N2: TMenuItem;
    N3: TMenuItem;
    N4: TMenuItem;
    procedure Button1Click(Sender: TObject);
    procedure aeKeyPress(Sender: TObject; var Key: Char);
    procedure Button2Click(Sender: TObject);
    procedure memoChange(Sender: TObject);
    procedure bChange(Sender: TObject);
  private
    { Private declarations }
  public
    { Public declarations }
  end;

var
  Vetvlenie4: TVetvlenie4;
a,b:real;
implementation

{$R *.dfm}

procedure TVetvlenie4.Button1Click(Sender: TObject);
begin

 a:= strtofloat(ae.text) ;
 if a<3 then b.text:='Обычная';
 if a>=3 then b.text:='Многодетная';

end;

procedure TVetvlenie4.aeKeyPress(Sender: TObject; var 
Key: Char);
begin
if not (Key in ['1'..'9', #8])then Key:=#0;
end;

procedure TVetvlenie4.Button2Click(Sender: TObject);

begin

ae.Text:='';
b.Text:='';
end;

procedure TVetvlenie4.memoChange(Sender: TObject);
begin
if ae.text='' then exit;
 a:= strtofloat(ae.text) ;
if a<3 then b.text:='Обычная';
if a>=3 then b.text:='Многодетная';
end;

procedure TVetvlenie4.bChange(Sender: TObject);
begin

end;

end.