Simple Calculator (SimCal)

import flash.events.MouseEvent;

var a:Number;
var b:Number;
var hasilop:Number;
var Tambah:Boolean = false;
var Kurang:Boolean = false;
var Bagi:Boolean = false;
var Kali:Boolean = false;

samadengan.addEventListener(MouseEvent.CLICK, Hasil);

function Hasil(event:MouseEvent)
{
    if(Tambah)
    {
        a = Number(A.text);
        b = Number(B.text);
        hasilop = a+b;
        hasil.text = hasilop.toString();
    } else if(Kurang)
    {
        a = Number(A.text);
        b = Number(B.text);
        hasilop = a-b;
        hasil.text = hasilop.toString();
    } else if(Kali)
    {
        a = Number(A.text);
        b = Number(B.text);
        hasilop = a*b;
        hasil.text = hasilop.toString();
    } else if(Bagi)
    {
        a = Number(A.text);
        b = Number(B.text);
        hasilop = a/b;
        hasil.text = hasilop.toString();
    }
}

tambah.addEventListener(MouseEvent.CLICK, tambahClick);

function tambahClick(event:MouseEvent)
{
    Tambah = true;
    Kurang = false;
    Kali = false;
    Bagi = false;
    operasi.text = "+";
}

kurang.addEventListener(MouseEvent.CLICK, kurangClick);

function kurangClick(event:MouseEvent)
{
    Kurang = true;
    Tambah = false;
    Kali = false;
    Bagi = false;
    operasi.text = "-";
}

kali.addEventListener(MouseEvent.CLICK, kaliClick);

function kaliClick(event:MouseEvent)
{
    Kali = true;
    Tambah = false;
    Kurang = false;
    Bagi = false;
    operasi.text = "*";
}

bagi.addEventListener(MouseEvent.CLICK, bagiClick);

function bagiClick(event:MouseEvent)
{
    Bagi = true;
    Tambah = false;
    Kurang = false;
    Kali = false;
    operasi.text = "/";
}

reset.addEventListener(MouseEvent.CLICK, resetAll);

function resetAll(event:MouseEvent)
{
    A.text = "";
    B.text = "";
    hasil.text = "";
    operasi.text = "";
}