📄 04.htm
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<html>
<head>
<title>计算器</title>
<meta http-equiv="目录类型" content="文本/html; 字符集=gb2312">
<style type="text/css">
<!--
a{font-style:normal;text-decoration:none;color:white}
a:hover {BACKGROUND:red;font-style:normal;text-decoration:none;color:yellow}
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table { font-size: 9pt}
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</style>
</head>
<body bgcolor="#336699" topmargin="0" leftmargin="0">
<table width="100%" border="0" cellspacing="0" cellpadding="0" style="font-size: 9pt;">
<tr bgcolor="#336699">
<td colspan="3" height="18"> </td>
</tr>
<tr>
<td bgcolor="#336699" width="18"></td>
<td align="center" bgcolor="#FFFFFF"> <br>
<table width="56%" border="0" cellspacing="0" cellpadding="0" height="355">
<tr>
<td rowspan="2" width="16" valign="top">
<table width="100%" border="0" cellspacing="0" cellpadding="0" class="white" style="FONT-SIZE: 11pt;">
<tr bgcolor="#336699" bordercolor="#336699">
<td style="BORDER-RIGHT: double; BORDER-TOP: double; BORDER-LEFT: double; BORDER-BOTTOM: double;" height="70"><strong><a href="04.htm">演<br>
<br>
示</a></strong></td>
</tr>
<tr bordercolor="#009900" bgcolor="#009900">
<td style="BORDER-RIGHT: double; BORDER-TOP: double; BORDER-LEFT: double; BORDER-BOTTOM: double" height="70"><strong><a href="04c.htm">源<br>
代<br>
码</a></strong></td>
</tr>
</table>
</td>
<td rowspan="2" width="8" bgcolor="#336699"> </td>
<td align="center" style="BORDER-RIGHT: double; BORDER-TOP: double; FONT-SIZE: 12pt; BORDER-LEFT: double; BORDER-BOTTOM: double" bordercolor="#336699" valign="top" height="335"><br>
<b>计 算 器</b>
<hr width="92%" size="1" align="center">
<table border=0 width="100%">
<tr>
<td valign=middle align=center rowspan=2>
<form name="keypad">
<center>
<font size="4" color="#66FF66"><b>
<script language="JavaScript">
<!--
function round(val)
{
return(Math.round(val*10000000)/10000000);
}
PI = 3.141592654;
function pie()
{
document.keypad.display.value = PI;
}
function MakeArray(n){
this.length=n;
for(var i=1; i<=n; i++) this[i]=0;
return this
}
link = new MakeArray(5);
function enter(num)
{
document.keypad.display.value += num;
}
function calculate(sign)
{
var temp = document.keypad.display.value * 1;
document.keypad.display.value = "";
document.keypad.list.value = temp;
link[1] = temp;
if (sign == "/") {link[2] = "/"; document.keypad.list.value += " / ";}
if (sign == "*") {link[2] = "*"; document.keypad.list.value += " * ";}
if (sign == "-") {link[2] = "-"; document.keypad.list.value += " - ";}
if (sign == "+") {link[2] = "+"; document.keypad.list.value += " + ";}
if (sign == "p") {link[2] = "p"; document.keypad.list.value += " ^ ";}
}
function power()
{
temp = 1;
n = link[3];
for(var i=1; i<=n; i++) temp *= link[1];
return(temp);
}
function equal()
{
if (link[2]) {
if (document.keypad.display.value != "") {
var temp = document.keypad.display.value * 1;
document.keypad.list.value += temp;
link[3] = temp;
if (link[2] == "/") {res = link[1] / link[3]; document.keypad.display.value = round(res)}
if (link[2] == "*") {res = link[1] * link[3]; document.keypad.display.value = round(res)}
if (link[2] == "-") {res = link[1] - link[3]; document.keypad.display.value = round(res)}
if (link[2] == "+") {res = link[1] + link[3]; document.keypad.display.value = round(res)}
if (link[2] == "p") {document.keypad.display.value = round( power() )}
link[1]=0; link[2]=0; link[3]=0;
}
}
}
function calc(code)
{
var temp = document.keypad.display.value * 1;
if (code == 1) {temp1 = Math.sin(temp*PI/180); document.keypad.list.value = "sin "}
if (code == 2) {temp1 = Math.cos(temp*PI/180); document.keypad.list.value = "cos "}
if (code == 3) {temp1 = Math.tan(temp*PI/180); document.keypad.list.value = "tan "}
if (code == 4) {temp1 = Math.sqrt(temp); document.keypad.list.value = "sqrt "}
if (code == 5) {temp1 = Math.log(temp); document.keypad.list.value = "ln "}
if (code == 6) {temp1 = 1/temp; document.keypad.list.value = "1/x, x="}
if (code == 7) {temp1 = temp * temp; document.keypad.list.value = "x*x, x="}
document.keypad.list.value += temp;
document.keypad.display.value = round(temp1);
}
function fsolve()
{
var a = document.keypad.c1.value*1;
var b = document.keypad.c2.value*1;
var c = document.keypad.c3.value*1;
if (a==0) {document.keypad.list.value = "Not a Quadratic";
document.keypad.display.value = "Equation"}
else { x1 = (b*b-4*a*c);
if ( x1 < 0) {document.keypad.list.value = "Imaginary Roots";
temp = (Math.sqrt(Math.abs(x1)))/(2*a);
x2 = round(-b/(2*a)) + "+/- " + round(temp) + "i";
document.keypad.display.value = x2}
else {
var x1 = (-b + Math.sqrt(b*b-4*a*c)) / (2*a);
var x2 = (-b - Math.sqrt(b*b-4*a*c)) / (2*a);
document.keypad.list.value = "x1 = " + round(x1);
document.keypad.display.value = "x2 = " + round(x2);
}
}
}
function change()
{
var temp = document.keypad.display.value;
if (temp.substring(0,1) == "-") {document.keypad.list.value = "";
document.keypad.display.value = 0 - document.keypad.display.value * 1}
if (temp.substring(0,1) != "-") {document.keypad.list.value = "";
document.keypad.display.value = "-" + temp.substring(0,temp.length)}
}
function eraser()
{
document.keypad.list.value = "Start Punching!";
document.keypad.display.value = "";
document.keypad.c1.value = "";
document.keypad.c2.value = "";
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