<html>
<title>Membuat program kalkulator sederhana menggunakan textbox </title>
<SCRIPT LANGUAGE="JavaScript">
window.defaultStatus="shintadesign@gmail.com"
function tambah()
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a+b
form.hasil.value = c
}
function kurang()
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a-b
form.hasil.value=c
}
function kali()
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a*b
form.hasil.value=c
}
function bagi()
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a/b
form.hasil.value = c
}
function pangkat()
{
a=eval(form.a.value)
b=eval(form.b.value)
c=Math.pow(a, b)
form.hasil.value = c
}
function persen()
{
a=eval(form.a.value)
b=eval(form.b.value)
c=a%b
form.hasil.value=c
}
function kosong()
{
form.a.focus()
form.a.value=""
form.b.value=""
form.hasil.value=""
}
</SCRIPT>
<body onload=kosong()>
<CENTER>
<font size="5">Program Kalkulator</font>
<hr size="5" color="red">
<FORM name="form">
<pre>
Angka 1 <input type="text" name="a">
Angka 2 <input type="text" name="b">
Hasil <input type "text" name="hasil" disabled="true">
</pre>
<hr size="2" color="blue">
<input type="button" value=" + " onClick="tambah()">
<input type="button" value=" - " onClick="kurang()">
<input type="button" value=" x " onClick="kali()">
<input type="button" value=" / " onClick="bagi()">
<input type="button" value=" ^ " onClick="pangkat()"><br>
<input type="button" value=" Kosong " onClick="kosong()">
<br>
Oleh: SHINTA DEWI<br>
Support by: Shintadesign@gmail.com
</FORM>
</CENTER>
</body>
</html>
<form name="Keypad" action>
<div align="left">
<blockquote>
<table border="1" width="50" height="60" cellpadding="2" cellspacing="0" bgcolor="#9FBAD0" bordercolor="#9FBAD0">
<tr>
<td colspan="3" align="middle">
<input name="ReadOut" type="Text" size="24" value="0"
width="100%">
</td>
<td>
<input name="btnClear" type="Button" value=" C " onClick="Clear()">
</td>
<td>
<input name="btnClearEntry" type="Button" value=" CE " onClick="ClearEntry()">
</td>
</tr>
<tr>
<td>
<input name="btnSeven" type="Button" value=" 7 " onClick="NumPressed(7)">
</td>
<td>
<input name="btnEight" type="Button" value=" 8 " onClick="NumPressed(Cool">
</td>
<td>
<input name="btnNine" type="Button" value=" 9 " onClick="NumPressed(9)">
</td>
<td> </td>
<td>
<input name="btnNeg" type="Button" value=" +/- " onClick="Neg()">
</td>
<td>
<input name="btnPercent" type="Button" value=" % " onClick="Percent()">
</td>
</tr>
<tr>
<td>
<input name="btnFour" type="Button" value=" 4 " onClick="NumPressed(4)">
</td>
<td>
<input name="btnFive" type="Button" value=" 5 " onClick="NumPressed(5)">
</td>
<td>
<input name="btnSix" type="Button" value=" 6 " onClick="NumPressed(6)">
</td>
<td> </td>
<td align="middle">
<p align="left">
<input name="btnPlus" type="Button" value=" + "
onClick="Operation('+')">
</p>
</td>
<td align="middle">
<input name="btnMinus" type="Button" value=" - "
onClick="Operation('-')">
</td>
</tr>
<tr>
<td>
<input name="btnOne" type="Button" value=" 1 " onClick="NumPressed(1)">
</td>
<td>
<input name="btnTwo" type="Button" value=" 2 " onClick="NumPressed(2)">
</td>
<td>
<input name="btnThree" type="Button" value=" 3 " onClick="NumPressed(3)">
</td>
<td> </td>
<td align="middle">
<p align="left">
<input name="btnMultiply" type="Button" value=" * "
onClick="Operation('*')">
</p>
</td>
<td align="middle">
<input name="btnDivide" type="Button" value=" / "
onClick="Operation('/')">
</td>
</tr>
<tr>
<td>
<input name="btnZero" type="Button" value=" 0 " onClick="NumPressed(0)">
</td>
<td>
<input name="btnDecimal" type="Button" value=" . " onClick="Decimal()">
</td>
<td colspan="3"> </td>
<td>
<input name="btnEquals" type="Button" value=" = " onClick="Operation('=')">
</td>
</tr>
</table>
</blockquote>
</div>
</form>
<script LANGUAGE="JavaScript">
// hmm.. who am i ? - http://www.indonesiancoder.com
var FKeyPad = document.Keypad;
var Accum = 0;
var FlagNewNum = false;
var PendingOp = "";
function NumPressed (Num) {
if (FlagNewNum) {
FKeyPad.ReadOut.value = Num;
FlagNewNum = false;
}
else {
if (FKeyPad.ReadOut.value == "0")
FKeyPad.ReadOut.value = Num;
else
FKeyPad.ReadOut.value += Num;
}
}
function Operation (Op) {
var Readout = FKeyPad.ReadOut.value;
if (FlagNewNum && PendingOp != "=");
else
{
FlagNewNum = true;
if ( '+' == PendingOp )
Accum += parseFloat(Readout);
else if ( '-' == PendingOp )
Accum -= parseFloat(Readout);
else if ( '/' == PendingOp )
Accum /= parseFloat(Readout);
else if ( '*' == PendingOp )
Accum *= parseFloat(Readout);
else
Accum = parseFloat(Readout);
FKeyPad.ReadOut.value = Accum;
PendingOp = Op;
}
}
function Decimal () {
var curReadOut = FKeyPad.ReadOut.value;
if (FlagNewNum) {
curReadOut = "0.";
FlagNewNum = false;
}
else
{
if (curReadOut.indexOf(".") == -1)
curReadOut += ".";
}
FKeyPad.ReadOut.value = curReadOut;
}
function ClearEntry () {
FKeyPad.ReadOut.value = "0";
FlagNewNum = true;
}
function Clear () {
Accum = 0;
PendingOp = "";
ClearEntry();
}
function Neg () {
FKeyPad.ReadOut.value = parseFloat(FKeyPad.ReadOut.value) * -1;
}
function Percent () {
FKeyPad.ReadOut.value = (parseFloat(FKeyPad.ReadOut.value) / 100) * parseFloat(Accum);
}
</script>
ini tampilannya :
