nit Rechner2;

interface

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

type
  TForm1 = class(TForm)
    Label1: TLabel;
    Label2: TLabel;
    Label3: TLabel;
    Button1: TButton;
    Button2: TButton;
    Button3: TButton;
    Button4: TButton;
    Label4: TLabel;
    Button5: TButton;
    Button6: TButton;
    procedure Button5Click(Sender: TObject);
    procedure Button1Click(Sender: TObject);
    procedure Button2Click(Sender: TObject);
    procedure Button3Click(Sender: TObject);
    procedure Button4Click(Sender: TObject);
    procedure Button6Click(Sender: TObject);
  private
    { Private-Deklarationen }
  public
    { Public-Deklarationen }
  end;

var
  Form1: TForm1;

implementation

{$R *.DFM}
var a, b, ausgabe : real;

procedure TForm1.Button5Click(Sender: TObject);
begin
  edit1.text :='';
  edit2.text :='';
  edit3.text :='';
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  a := strtofloat(edit1.text);
  b := strtofloat(edit2.text);
  ausgabe := a+b;

  edit3.text := floattostr (ausgabe)
end;

procedure TForm1.Button2Click(Sender: TObject);
begin
  a := strtofloat(edit1.text);
  b := strtofloat(edit2.text);
  ausgabe := a-b;

  edit3.text := floattostr (ausgabe)
end;

procedure TForm1.Button3Click(Sender: TObject);
begin
  a := strtofloat(edit1.text);
  b := strtofloat(edit2.text);
  ausgabe := a*b;

  edit3.text := floattostr (ausgabe)
end;

procedure TForm1.Button4Click(Sender: TObject);
begin
  a := strtofloat(edit1.text);
  b := strtofloat(edit2.text);
  ausgabe := a/b;

  edit3.text := floattostr (ausgabe)
end;

procedure TForm1.Button6Click(Sender: TObject);
begin
  close
end;

end.