Игростроение - Создание игр

unit Unit1;

interface

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

type
   TForm1 = class(TForm)
     EndEdit: TEdit;
     ResultEdit: TEdit;
     Label1: TLabel;
     Label2: TLabel;
     CalculateButton: TButton;
     procedure CalculateButtonClick(Sender: TObject);
   private
     { Private declarations }
   public
     { Public declarations }
   end;

var
   Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.CalculateButtonClick(Sender: TObject);
begin
var
   index:Integer;
   sum: Integer;
   EndCount:Integer;
  begin
   Sum:=0;
   EndCount:=StrToInt(EndEdit.Text);
  for index:=0 to EndCount do
   Sum:=Sum+index;
   ResultEdit.Text:=IntToStr(Sum);
end;

end.

EndCount:=StrToInt(EndEdit.Text);

EndEdit.Text:=IntToStr(EndCount);