2 сем / 5 лаба / 5.2 / Unit1

unit Unit1;

interface

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

type
TForm1 = class(TForm)
le1: TLabeledEdit;
le2: TLabeledEdit;
btn1: TBitBtn;
l1: TLabel;
procedure btn1Click(Sender: TObject);
private
{ Private declarations }
public
{ Public declarations }
end;

var
Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.btn1Click(Sender: TObject);
const a=3;
var x,y:Real;
begin
x := StrToFloat(le1.Text);
y := StrToFloat(le2.Text);
if (Abs(x)<=a) and (y<=(a-Abs(x))) and (y>=0)
then l1.Caption:='ДА'
else
l1.Caption:='НЕТ';
end;
end.