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javascript 计算器

来源：互联网 发布：江阴教育网络教研平台 编辑：程序博客网 时间：2024/05/08 17:07
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<style type="text/css">
<!--
.b3 {
    font-size: 12px;
    color: #FF6501;
    background-color: #FBFBFB;
    background-position: center;
    border: 1px solid #B2B2B2;
    height: 23px;
    width: 61px;
}
-->
</style>
<style type="text/css">
<!--
.b4 {
    font-size: 12px;
    color: #888485;
    background-color: #FBFBFB;
    background-position: center;
    border: 1px solid #B2B2B2;
    height: 23px;
    width: 32px;
}
-->
</style>
<style type="text/css">
<!--
.xo {
    font-size: 12px;
    color: #FF6701;
    background-color: #FBFBFB;
    background-position: center;
    border: 1px solid #B2B2B2;
    height: 23px;
    width: 32px;
}
-->
</style>
</head>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">

<title>个人助理-计算器</title>
<style>
body,td {font-size:12px;}
.b1 {
    font-family: "宋体";
    font-size: 12px;
    color: #313596;
    background-color: #FBFBFB;
    background-position: center;
    border: 1px solid #B2B2B2;
    height: 23px;
    width: 43px;
}
.b2 {
    font-size: 12px;
    color: #FE3498;
    background-color: #FBFBFB;
    background-position: center;
    border: 1px solid #B2B2B2;
    height: 23px;
    width: 43px;
}
.xn {
    font-size: 12px;
    color: #313398;
    background-color: #FBFBFB;
    background-position: center;
    height: 23px;
    width: 32px;
    border: 1px solid #B2B2B2;
}
.dh {
    font-size: 12px;
    color: #868485;
    background-color: #FBFBFB;
    background-position: center;
    height: 23px;
    width: 40px;
    border: 1px solid #B2B2B2;
}
.or {
    font-size: 12px;
    color: #FE6700;
    height: 23px;
    width: 40px;
    background-color: #FBFBFB;
    background-position: center;
    border: 1px solid #B2B2B2;
}
.border {
    border: 1px solid #B1BAC3;
}
</style>

<script language="javascript">
<!--
var endNumber=true
var mem=0
var carry=10
var hexnum="0123456789abcdef"
var angle="d"
var stack=""
var level="0"
var layer=0


//数字键

function inputkey(key)
{
    var index=key.charCodeAt(0);
    if ((carry==2 && (index==48 || index==49))
     || (carry==8 && index>=48 && index<=55)
     || (carry==10 && (index>=48 && index<=57 || index==46))
     || (carry==16 && ((index>=48 && index<=57) || (index>=97 && index<=102))))
    if(endNumber)
    {
        endNumber=false
        document.calc.display.value = key
    }
    else if(document.calc.display.value == null || document.calc.display.value == "0")
        document.calc.display.value = key
    else
        document.calc.display.value += key
}

function changeSign()
{
    if (document.calc.display.value!="0")
        if(document.calc.display.value.substr(0,1) == "-")
            document.calc.display.value = document.calc.display.value.substr(1)
        else
            document.calc.display.value = "-" + document.calc.display.value
}

//函数键

function inputfunction(fun,shiftfun)
{
    endNumber=true
    if (document.calc.shiftf.checked)
        document.calc.display.value=decto(funcalc(shiftfun,(todec(document.calc.display.value,carry))),carry)
    else
        document.calc.display.value=decto(funcalc(fun,(todec(document.calc.display.value,carry))),carry)
    document.calc.shiftf.checked=false
    document.calc.hypf.checked=false    
    inputshift()
}

function inputtrig(trig,arctrig,hyp,archyp)
{
    if (document.calc.hypf.checked)
        inputfunction(hyp,archyp)
    else
        inputfunction(trig,arctrig)
}


//运算符

function operation(join,newlevel)
{
    endNumber=true
    var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value
    while (newlevel!=0 && (newlevel<=(level.charAt(level.length-1))))
    {
        temp=parse(temp)
        level=level.slice(0,-1)
    }
    if (temp.match(/^(.*d[+-*/%^&|x])?([+-]?[0-9a-f.]+)$/))
        document.calc.display.value=RegExp.$2
    stack=stack.substr(0,stack.lastIndexOf("(")+1)+temp+join
    document.calc.operator.value=" "+join+" "
    level=level+newlevel
    
}

//括号

function addbracket()
{
    endNumber=true
    document.calc.display.value=0
    stack=stack+"("
    document.calc.operator.value="   "
    level=level+0
    
    layer+=1
    document.calc.bracket.value="(="+layer
}

function disbracket()
{
    endNumber=true
    var temp=stack.substr(stack.lastIndexOf("(")+1)+document.calc.display.value
    while ((level.charAt(level.length-1))>0)
    {
        temp=parse(temp)
        level=level.slice(0,-1)
    }
    
    document.calc.display.value=temp
    stack=stack.substr(0,stack.lastIndexOf("("))
    document.calc.operator.value="   "
    level=level.slice(0,-1)

    layer-=1
    if (layer>0)
        document.calc.bracket.value="(="+layer
    else
        document.calc.bracket.value=""
}

//等号

function result()
{
    endNumber=true
    while (layer>0)
        disbracket()
    var temp=stack+document.calc.display.value
    while ((level.charAt(level.length-1))>0)
    {
        temp=parse(temp)
        level=level.slice(0,-1)
    }

    document.calc.display.value=temp
    document.calc.bracket.value=""
    document.calc.operator.value=""
    stack=""
    level="0"
}


//修改键

function backspace()
{
    if (!endNumber)
    {
        if(document.calc.display.value.length>1)
            document.calc.display.value=document.calc.display.value.substring(0,document.calc.display.value.length - 1)
        else
            document.calc.display.value=0
    }
}

function clearall()
{
    document.calc.display.value=0
    endNumber=true
    stack=""
    level="0"
    layer=""
    document.calc.operator.value=""
    document.calc.bracket.value=""
}


//转换键

function inputChangCarry(newcarry)
{
    endNumber=true
    document.calc.display.value=(decto(todec(document.calc.display.value,carry),newcarry))
    carry=newcarry

    document.calc.sin.disabled=(carry!=10)
    document.calc.cos.disabled=(carry!=10)
    document.calc.tan.disabled=(carry!=10)
    document.calc.bt.disabled=(carry!=10)
    document.calc.pi.disabled=(carry!=10)
    document.calc.e.disabled=(carry!=10)
    document.calc.kp.disabled=(carry!=10)
                
    document.calc.k2.disabled=(carry<=2)
    document.calc.k3.disabled=(carry<=2)
    document.calc.k4.disabled=(carry<=2)
    document.calc.k5.disabled=(carry<=2)
    document.calc.k6.disabled=(carry<=2)
    document.calc.k7.disabled=(carry<=2)
    document.calc.k8.disabled=(carry<=8)
    document.calc.k9.disabled=(carry<=8)
    document.calc.ka.disabled=(carry<=10)
    document.calc.kb.disabled=(carry<=10)
    document.calc.kc.disabled=(carry<=10)
    document.calc.kd.disabled=(carry<=10)
    document.calc.ke.disabled=(carry<=10)
    document.calc.kf.disabled=(carry<=10)

    
    
}

function inputChangAngle(angletype)
{
    endNumber=true
    angle=angletype
    if (angle=="d")
        document.calc.display.value=radiansToDegress(document.calc.display.value)
    else
        document.calc.display.value=degressToRadians(document.calc.display.value)
    endNumber=true
}

function inputshift()
{
    if (document.calc.shiftf.checked)
    {
        document.calc.bt.value="deg "
        document.calc.ln.value="exp "
        document.calc.log.value="expd"
        
        if (document.calc.hypf.checked)
        {
            document.calc.sin.value="ahs "
            document.calc.cos.value="ahc "
            document.calc.tan.value="aht "
        }
        else
        {
            document.calc.sin.value="asin"
            document.calc.cos.value="acos"
            document.calc.tan.value="atan"
        }
        
        document.calc.sqr.value="x^.5"
        document.calc.cube.value="x^.3"
        
        document.calc.floor.value="小数"
    }
    else
    {
        document.calc.bt.value="d.ms"
        document.calc.ln.value=" ln "
        document.calc.log.value="log "

        if (document.calc.hypf.checked)
        {
            document.calc.sin.value="hsin"
            document.calc.cos.value="hcos"
            document.calc.tan.value="htan"
        }
        else
        {
            document.calc.sin.value="sin "
            document.calc.cos.value="cos "
            document.calc.tan.value="tan "
        }
        
        document.calc.sqr.value="x^2 "
        document.calc.cube.value="x^3 "
        
        document.calc.floor.value="取整"
    }

}
//存储器部分

function clearmemory()
{
    mem=0
    document.calc.memory.value="   "
}

function getmemory()
{
    endNumber=true
    document.calc.display.value=decto(mem,carry)
}

function putmemory()
{
    endNumber=true
    if (document.calc.display.value!=0)
    {
        mem=todec(document.calc.display.value,carry)
        document.calc.memory.value=" M "
    }
    else
        document.calc.memory.value="   "
}

function addmemory()
{
    endNumber=true
    mem=parseFloat(mem)+parseFloat(todec(document.calc.display.value,carry))
    if (mem==0)
        document.calc.memory.value="   "
    else
        document.calc.memory.value=" M "
}

function multimemory()
{
    endNumber=true
    mem=parseFloat(mem)*parseFloat(todec(document.calc.display.value,carry))
    if (mem==0)
        document.calc.memory.value="   "
    else
        document.calc.memory.value=" M "
}

//十进制转换

function todec(num,oldcarry)
{
    if (oldcarry==10 || num==0) return(num)
    var neg=(num.charAt(0)=="-")
    if (neg) num=num.substr(1)
    var newnum=0
    for (var index=1;index<=num.length;index++)
        newnum=newnum*oldcarry+hexnum.indexOf(num.charAt(index-1))
    if (neg)
        newnum=-newnum
    return(newnum)
}

function decto(num,newcarry)
{
    var neg=(num<0)
    if (newcarry==10 || num==0) return(num)
    num=""+Math.abs(num)
    var newnum=""
    while (num!=0)
    {
        newnum=hexnum.charAt(num%newcarry)+newnum
        num=Math.floor(num/newcarry)
    }
    if (neg)
        newnum="-"+newnum
    return(newnum)
}

//表达式解析

function parse(string)
{
    if (string.match(/^(.*d[+-*/%^&|x<])?([+-]?[0-9a-f.]+)([+-*/%^&|x<])([+-]?[0-9a-f.]+)$/))
        return(RegExp.$1+cypher(RegExp.$2,RegExp.$3,RegExp.$4))
    else
        return(string)
}

//数学运算和位运算

function cypher(left,join,right)
{
    left=todec(left,carry)
    right=todec(right,carry)
    if (join=="+")
        return(decto(parseFloat(left)+parseFloat(right),carry))
    if (join=="-")
        return(decto(left-right,carry))
    if (join=="*")
        return(decto(left*right,carry))
    if (join=="/" && right!=0)
        return(decto(left/right,carry))
    if (join=="%")
        return(decto(left%right,carry))
    if (join=="&")
        return(decto(left&right,carry))
    if (join=="|")
        return(decto(left|right,carry))
    if (join=="^")
        return(decto(Math.pow(left,right),carry))
    if (join=="x")
        return(decto(left^right,carry))
    if (join=="<")
        return(decto(left<<right,carry))
    alert("除数不能为零")
    return(left)
}

//函数计算

function funcalc(fun,num)
{
    with(Math)
    {
        if (fun=="pi")
            return(PI)
        if (fun=="e")
            return(E)

        if (fun=="abs")
            return(abs(num))
        if (fun=="ceil")
            return(ceil(num))
        if (fun=="round")
            return(round(num))

        if (fun=="floor")
            return(floor(num))
        if (fun=="deci")
            return(num-floor(num))


        if (fun=="ln" && num>0)
            return(log(num))
        if (fun=="exp")
            return(exp(num))
        if (fun=="log" && num>0)
            return(log(num)*LOG10E)
        if (fun=="expdec")
            return(pow(10,num))

        
        if (fun=="cube")
            return(num*num*num)
        if (fun=="cubt")
            return(pow(num,1/3))
        if (fun=="sqr")
            return(num*num)
        if (fun=="sqrt" && num>=0)
            return(sqrt(num))

        if (fun=="!")
            return(factorial(num))

        if (fun=="recip" && num!=0)
            return(1/num)
        
        if (fun=="dms")
            return(dms(num))
        if (fun=="deg")
            return(deg(num))

        if (fun=="~")
            return(~num)
    
        if (angle=="d")
        {
            if (fun=="sin")
                return(sin(degressToRadians(num)))
            if (fun=="cos")
                return(cos(degressToRadians(num)))
            if (fun=="tan")
                return(tan(degressToRadians(num)))

            if (fun=="arcsin" && abs(num)<=1)
                return(radiansToDegress(asin(num)))
            if (fun=="arccos" && abs(num)<=1)
                return(radiansToDegress(acos(num)))
            if (fun=="arctan")
                return(radiansToDegress(atan(num)))
        }
        else
        {
            if (fun=="sin")
                return(sin(num))
            if (fun=="cos")
                return(cos(num))
            if (fun=="tan")
                return(tan(num))

            if (fun=="arcsin" && abs(num)<=1)
                return(asin(num))
            if (fun=="arccos" && abs(num)<=1)
                return(acos(num))
            if (fun=="arctan")
                return(atan(num))
        }
    
        if (fun=="hypsin")
            return((exp(num)-exp(0-num))*0.5)
        if (fun=="hypcos")
            return((exp(num)+exp(-num))*0.5)
        if (fun=="hyptan")
            return((exp(num)-exp(-num))/(exp(num)+exp(-num)))

        if (fun=="ahypsin" | fun=="hypcos" | fun=="hyptan")
        {
            alert("对不起,公式还没有查到!")
            return(num)
        }
        
        alert("超出函数定义范围")
        return(num)
    }
}

function factorial(n)
{
    n=Math.abs(parseInt(n))
    var fac=1
    for (;n>0;n-=1)
        fac*=n
    return(fac)
}

function dms(n)
{
    var neg=(n<0)
    with(Math)
    {    
        n=abs(n)
        var d=floor(n)
        var m=floor(60*(n-d))
        var s=(n-d)*60-m
    }
    var dms=d+m/100+s*0.006
    if (neg) 
        dms=-dms
    return(dms)
}

function deg(n)
{
    var neg=(n<0)
    with(Math)
    {
        n=abs(n)
        var d=floor(n)
        var m=floor((n-d)*100)
        var s=(n-d)*100-m
    }
    var deg=d+m/60+s/36
    if (neg) 
        deg=-deg
    return(deg)
}

function degressToRadians(degress)
{
    return(degress*Math.PI/180)
}

function radiansToDegress(radians)
{
    return(radians*180/Math.PI)
}

//界面

//-->
</script>
</head>
<body>

<div align="center">个人助理-计算器
<form name=calc>
    <table width="500" cellspacing="2">
      <tr> 
        <td align="center"> 
          <table width="490" height="45" cellspacing="0" class="border">
            <tr> 
              <td width="26" align="center" bgcolor="#E6F0FA"> </td>
              <td width="445" align="left" bgcolor="#E6F0FA">结果： &nbsp; 
                <input type=text name="display" value="0" readonly size="40"></td>
          </table>
        </td>
</tr>
<tr>
        <td align="center"> 
          <table width="100%">
            <tr>
              <td> 
                <input type=radio name="carry" onClick="inputChangCarry(16)">
                十六进制 
                <input type=radio name="carry" checked onClick="inputChangCarry(10)">
      十进制 
      <input type=radio name="carry" onClick="inputChangCarry(8)">
      八进制 
      <input type=radio name="carry" onClick="inputChangCarry(2)">
      二进制 
</td>
<td>
</td>
              <td> 
                <input type=radio name="angle" value="d" onClick="inputChangAngle('d')" checked>
      角度制 
      <input type=radio name="angle" value="r" onClick="inputChangAngle('r')">
      弧度制 
</td>
</tr>
</table>
          <table width="100%" height="40" border="0" cellpadding="0" cellspacing="1">
            <tr>
              <td align="center">
<table width="100%">
                  <tr> 
                    <td> 
                      <input name="shiftf" type="checkbox" onclick="inputshift()">
                      上档功能 
                      <input name="hypf" type="checkbox" onclick="inputshift()">
                      双曲函数 </td>
                    <td> 
                      <input name="bracket" value="" type=text size=3 readonly style="background-color=lightgrey"> 
                      <input name="memory" value="" type=text size=3 readonly style="background-color=lightgrey"> 
                      <input name="operator" value="" type=text size=3 readonly style="background-color=lightgrey">
                    </td>
                    <td align="right"> 
                      <input name="button2" type="button" class="b3" 
   onclick="backspace()" value=" 退格 "> <input name="button2" type="button" class="b3" 
   onClick="document.calc.display.value = 0 " value=" 清屏 "> <input name="button2" type="button" class="b3" 
   onClick="clearall()" value=" 全清"> </td>
                  </tr>
                </table>
              </td>
            </tr>
          </table>
          <table width="100%" cellspacing="0">
            <tr align="left"> 
              <td width="29%"> 
                <table cellpadding="1" cellspacing="1">
                  <tr  align=center> 
                    <td width="42" height="23"> <input name=pi type="button" class="b1" 
  onClick="inputfunction('pi','pi')" value=" PI "> </td>
                    <td width="42" height="23"> <input name=e type="button" class="b1"
  onClick="inputfunction('e','e')" value=" E  "> </td>
                    <td width="42" height="23"> <input name=bt type="button" class="b2" 
    onClick="inputfunction('dms','deg')" value="d.ms"> </td>
                  </tr>
                  <tr  align=center> 
                    <td width="42" height="23"> <input name="button"  type="button" class="b2" style="color=#ff00ff"
  onClick="addbracket()" value=" (  "> </td>
                    <td width="42" height="23"> <input name="button"  type="button" class="b2" 
  onClick="disbracket()" value=" )  "> </td>
                    <td width="42" height="23"> <input name=ln type="button" class="b2" 
  onClick="inputfunction('ln','exp')" value=" ln "> </td>
                  </tr>
                  <tr  align=center> 
                    <td width="42" height="23"> <input name=sin type="button" class="b2"
  onClick="inputtrig('sin','arcsin','hypsin','ahypsin')" value="sin "> </td>
                    <td width="42" height="23"> <input name="button"  type="button" class="b2" 
  onClick="operation('^',7)" value="x^y "> </td>
                    <td width="42" height="23"> <input name=log type="button" class="b2"
  onClick="inputfunction('log','expdec')" value="log "> </td>
                  </tr>
                  <tr  align=center> 
                    <td width="42" height="23"> <input name=cos type="button" class="b2"
  onClick="inputtrig('cos','arccos','hypcos','ahypcos')" value="cos "> </td>
                    <td width="42" height="23"> <input name=cube type="button" class="b2"
  onClick="inputfunction('cube','cubt')" value="x^3 "> </td>
                    <td width="42" height="23"> <input name="button"  type="button" class="b2" 
  onClick="inputfunction('!','!')" value=" n! "> </td>
                  </tr>
                  <tr  align=center> 
                    <td width="42" height="23"> <input name=tan type="button" class="b2" 
  onClick="inputtrig('tan','arctan','hyptan','ahyptan')" value="tan "> </td>
                    <td width="42" height="23"> <input name=sqr type="button" class="b2"
  onClick="inputfunction('sqr','sqrt')" value="x^2 "> </td>
                    <td width="42" height="23"> <input name="button"  type="button" class="b2"
  onClick="inputfunction('recip','recip')" value="1/x "> </td>
                  </tr>
                </table></td>
              <td width="38%"> 
                <table align="center" cellpadding="1">
                  <tr> 
                    <td width="65"> <input  type="button" class="b3" 
  onClick="putmemory()" value=" 储存 "> </td>
                  </tr>
                  <td> <input  type="button" class="b3" 
  onClick="getmemory()" value=" 取存 "> </td>
                  </tr>
                  <tr> 
                    <td> <input  type="button" class="b3"
  onClick="addmemory()" value=" 累存 "> </td>
                  </tr>
                  <tr> 
                    <td> <input  type="button" class="b3" 
  onClick="multimemory()" value=" 积存 "> </td>
                  </tr>
                  <tr> 
                    <td> <input  type="button" class="b3"
  onClick="clearmemory()" value=" 清存 "> </td>
                  </tr>
                </table></td>
              <td width="33%" align="right"> 
                <table cellpadding="1" >
                  <tr  align=center> 
                    <td > <input name=k7 type="button" value=" 7 "
  onClick="inputkey('7')" class="xn" ></td>
                    <td  > <input name=k8 type="button" class="xn" value=" 8 "
  onClick="inputkey('8')" > </td>
                    <td> <input name=k9 type="button" class="xn" value=" 9 "
  onClick="inputkey('9')" > </td>
                    <td> <input  type="button" class="xo" 
  onClick="operation('/',6)" value=" / "> </td>
                    <td> <input  type="button" class="or" 
  onClick="operation('%',6)" value="取余"> </td>
                    <td> <input  type="button" class="or"
  onClick="operation('&',3)" value=" 与 "> </td>
                  </tr>
                  <tr  align=center> 
                    <td > <input name=k4 type="button"  class="xn" value=" 4 "
  onClick="inputkey('4')" > </td>
                    <td> <input name=k5 type="button" class="xn" value=" 5 "
  onClick="inputkey('5')" > </td>
                    <td > <input name=k6 type="button" class="xn" value=" 6 "
  onClick="inputkey('6')" > </td>
                    <td> <input  type="button" class="xo" 
  onClick="operation('*',6)" value=" * "> </td>
                    <td> <input name=floor type="button" class="or" 
  onClick="inputfunction('floor','deci')" value="取整"> </td>
                    <td> <input  type="button" class="or" 
  onClick="operation('|',1)" value=" 或 "> </td>
                  </tr>
                  <tr  align=center> 
                    <td > <input  type="button" value=" 1 "
  onClick="inputkey('1')" class="xn" > </td>
                    <td > <input name=k2 type="button" value=" 2 "
  onClick="inputkey('2')"  class="xn"> </td>
                    <td > <input name=k3 type="button" class="xn" value=" 3 "
  onClick="inputkey('3')" > </td>
                    <td> <input  type="button" class="xo" 
  onClick="operation('-',5)" value=" - "> </td>
                    <td> <input  type="button" class="or"
  onClick="operation('<',4)" value="左移"> </td>
                    <td> <input  type="button" class="or" 
  onClick="inputfunction('~','~')" value=" 非 "> </td>
                  </tr>
                  <tr  align=center> 
                    <td > <input  type="button" value=" 0 "
  onClick="inputkey('0')" class="xn" > </td>
                    <td > <input  type="button" value="+/-"
  onClick="changeSign()"  class="xn"
  > </td>
                    <td > <input name=kp type="button" value=" . "
  onClick="inputkey('.')" class="xn" > </td>
                    <td> <input  type="button" class="xo" 
  onClick="operation('+',5)" value=" + "> </td>
                    <td> <input  type="button" class="or" 
  onClick="result()" value=" ＝ "> </td>
                    <td> <input  type="button" class="or"
  onClick="operation('x',2)" value="异或"> </td>
                  </tr>
                  <tr  align=center> 
                    <td> <input name=ka type="button" disabled=true class="b4" 
  onClick="inputkey('a')" value=" A "> </td>
                    <td> <input name=kb type="button" disabled=true class="b4" 
  onClick="inputkey('b')" value=" B "> </td>
                    <td> <input name=kc type="button" disabled=true class="b4" 
  onClick="inputkey('c')" value=" C "> </td>
                    <td> <input name=kd type="button" disabled=true class="b4" 
  onClick="inputkey('d')" value=" D "> </td>
                    <td> <input name=ke type="button" disabled=true class="dh" 
  onClick="inputkey('e')" value=" E"> </td>
                    <td> <input name=kf type="button" disabled=true class="dh" 
  onClick="inputkey('f')" value=" F"></td>
                  </tr>
                </table>
              </td>
            </tr>
          </table>
        </td>
</tr>
</table>
      
    
    
  </form>
</div>
<!--计数代码-->
<!-- START NNR Site Census V5.1 -->
<!-- COPYRIGHT 2004 Nielsen // Netratings -->
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