Aplikasi Kalkulator sederhana dengan borland delphi

Pertama-tama bualah tampilan form seperti gambar di bawah :

lalu dibawah ini adalah source codenya :

unit Kalkulator;

interface

uses

Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,

Dialogs, StdCtrls;

type

TForm1 = class(TForm)

Label1: TLabel;

Label2: TLabel;

Label3: TLabel;

Label4: TLabel;

Edit1: TEdit;

Edit2: TEdit;

Button1: TButton;

Button2: TButton;

Button3: TButton;

Button4: TButton;

procedure Button1Click(Sender: TObject);

procedure Button2Click(Sender: TObject);

procedure Button3Click(Sender: TObject);

procedure Button4Click(Sender: TObject);

private

{ Private declarations }

public

{ Public declarations }

end;

var

Form1: TForm1;

implementation

{$R *.dfm}

procedure TForm1.Button1Click(Sender: TObject);

begin

Label4.Caption:=inttostr(strtoint(edit1.Text)+strtoint(edit2.Text));

end;

procedure TForm1.Button2Click(Sender: TObject);

begin

label4.Caption:=inttostr(strtoint(edit1.Text)-strtoint(edit2.Text));

end;

procedure TForm1.Button3Click(Sender: TObject);

begin

label4.Caption:=inttostr(strtoint(edit1.Text)*strtoint(edit2.Text));

end;

procedure TForm1.Button4Click(Sender: TObject);

begin

label4.Caption:=floattostr(strtoint(edit1.Text)/strtoint(edit2.Text));

end;

end.

truz run dan hasilnya seperti dibawah ini :

Selamat mencoba..