073

精緻計算機

將下列程式碼複製至<head>程式碼</head>區內。

<form name="Keypad" action>
<table border="1" width="249" height="30" cellpadding="0" cellspacing="1" bordercolorlight="#CCCCCC" bordercolordark="#999999" bordercolor="#CCCCCC" bgcolor="#666666">
<tr>
<td colspan="4" align="middle"><input name="ReadOut" type="Text" size="30" value="0" width="100%" class="text_input"></td>
<td width="0">　</td>
<td width="50"><input name="btnClear" type="Button" value=" C " onclick="Clear()" class="Button"></td>
<td><input name="btnClearEntry2" type="Button" value=" CE " onClick="ClearEntry()" class="Button"></td>
</tr>
<tr>
<td width="50"><input name="btnSeven" type="Button" value=" 7 " onclick="NumPressed(7)" class="Button"></td>
<td width="50"><input name="btnEight" type="Button" value=" 8 " onclick="NumPressed(8)" class="Button"></td>
<td width="50"><input name="btnNine" type="Button" value=" 9 " onclick="NumPressed(9)" class="Button"></td>
<td width="50"><input name="btnHex" type="Button" value="HEX" onClick="hexchange()" class="Button"></td>
<td width="0">　</td>
<td width="50"><input name="btnNeg" type="Button" value=" +/- " onclick="Neg()" class="Button"></td>
<td><input name="btnPercent" type="Button" value=" % " onClick="Percent()" class="Button"></td>
</tr>
<tr>
<td width="50"><input name="btnFour" type="Button" value=" 4 " onclick="NumPressed(4)" class="Button"></td>
<td width="50"><input name="btnFive" type="Button" value=" 5 " onclick="NumPressed(5)" class="Button"></td>
<td width="50"><input name="btnSix" type="Button" value=" 6 " onclick="NumPressed(6)" class="Button"></td>
<td width="50"><input name="btnClearEntry222" type="Button" value="OCT" onClick="octchange()" class="Button"></td>
<td width="0">　</td>
<td align="middle" width="50"><input name="btnPlus" type="Button" value=" + " onclick="Operation('+')" class="Button"></td>
<td align="middle"><input name="btnMinus" type="Button" value=" - " onClick="Operation('-')" class="Button"></td>
</tr>
<tr>
<td width="50"><input name="btnOne" type="Button" value=" 1 " onclick="NumPressed(1)" class="Button"></td>
<td width="50"><input name="btnTwo" type="Button" value=" 2 " onclick="NumPressed(2)" class="Button"></td>
<td width="50"><input name="btnThree" type="Button" value=" 3 " onclick="NumPressed(3)" class="Button"></td>
<td width="50"><input name="btnClearEntry23" type="Button" value="BIN" onClick="binchange()" class="Button"></td>
<td width="0">　</td>
<td align="middle" width="50"><input name="btnMultiply" type="Button" value=" * " onclick="Operation('*')" class="Button"></td>
<td align="middle"><input name="btnDivide" type="Button" value=" / " onClick="Operation('/')" class="Button"></td>
</tr>
<tr>
<td width="50"><input name="btnZero" type="Button" value=" 0 " onclick="NumPressed(0)" class="Button"></td>
<td width="50"><input name="btnDecimal" type="Button" value=" . " onclick="Decimal()" class="Button"></td>
<td colspan="4">
<div align="center">
<a href="http://www.tacocity.com.tw/ppkoabcd" target="_blank">JavaScript
收集區</a>
</div>
</td>
<td colspan="5"><input name="btnEquals" type="Button" value=" = " onClick="Operation('=')" class="Button"></td>
</tr>
</table>
</form>
<script LANGUAGE="JavaScript">
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);
}
function hexchange()
{
var hex,dec;
dec = parseFloat(FKeyPad.ReadOut.value);
hex = dec.toString(16);
window.alert("該十進制數轉成十六進制數為："+ hex);
}
function octchange()
{
var oct,dec;
dec = parseFloat(FKeyPad.ReadOut.value);
oct = dec.toString(8);
window.alert("該十進制數轉成八進制數為："+ oct);
}
function binchange()
{
var bin,dec;
dec = parseFloat(FKeyPad.ReadOut.value);
bin = dec.toString(2);
window.alert("該十進制數轉成二進制數為："+ bin);
}
</script>

將下列程式碼複製至<body>程式碼</body>之間。





		JavaScript 收集區