共享一个科学计算器（js版本） - 点点滴滴简简单单- 博客园

 效果图：

代码如下，将代码存为html。用浏览器直接运行

代码

<HTML><HEAD><TITLE>科学计算器</TITLE>
<META content="text/html; charset=gb2312" http-equiv=Content-Type><!----><!--2000.8-->
<STYLE>BODY {
    BACKGROUND-ATTACHMENT: fixed; BACKGROUND-COLOR: #edf0e1; COLOR: #0001fc; FONT-FAMILY: "宋体", "Arial", "Times New Roman"; FONT-SIZE: 9pt
}
TD {
    FONT-FAMILY: "宋体", "Arial Narrow", "Times New Roman"; FONT-SIZE: 9pt; font-color: #000000
}
</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>
<!--written by GoldHuman li hai--><!--2000.8-->
<META content="Microsoft FrontPage 12.0" name=GENERATOR></HEAD>
<BODY>
<DIV align=center>
<FORM name=calc>
<TABLE border=1 height=250 width=500>
  <TBODY>
  <TR>
    <TD height=50>
      <TABLE width=500>
        <TBODY>
        <TR>
          <TD></TD>
          <TD>
            <DIV align=center><INPUT name=display readOnly size=40 value=0> 
            </DIV></TD></TR></TBODY></TABLE></TD></TR>
  <TR>
    <TD>
      <TABLE width=500>
        <TBODY>
        <TR>
          <TD width=290><INPUT name=carry onclick=inputChangCarry(16) 
            type=radio> 十六进制 <INPUT CHECKED name=carry 
            onclick=inputChangCarry(10) type=radio> 十进制 <INPUT name=carry 
            onclick=inputChangCarry(8) type=radio> 八进制 <INPUT name=carry 
            onclick=inputChangCarry(2) type=radio> 二进制 </TD>
          <TD></TD>
          <TD width=135><INPUT CHECKED name=angle 
            onclick="inputChangAngle('d')" type=radio value=d> 角度制 <INPUT 
            name=angle onclick="inputChangAngle('r')" type=radio value=r> 弧度制 
        </TD></TR></TBODY></TABLE>
      <TABLE width=500>
        <TBODY>
        <TR>
          <TD width=170><INPUT name=shiftf onclick=inputshift() 
            type=checkbox>上档功能 <INPUT name=hypf onclick=inputshift() 
            type=checkbox>双曲函数 </TD>
          <TD><INPUT name=bracket readOnly size=3 
            style="BACKGROUND-COLOR: lightgrey"> <INPUT name=memory readOnly 
            size=3 style="BACKGROUND-COLOR: lightgrey"> <INPUT name=operator 
            readOnly size=3 style="BACKGROUND-COLOR: lightgrey"> </TD>
          <TD width=183><INPUT onclick=backspace() style="COLOR: red" type=button value=" 退格 "> 
<INPUT onclick="document.calc.display.value = 0 " style="COLOR: red" type=button value=" 清屏 "> 
<INPUT onclick=clearall() style="COLOR: red" type=button value=" 全清"> 
          </TD></TR></TBODY></TABLE>
      <TABLE width=500>
        <TBODY>
        <TR>
          <TD>
            <TABLE>
              <TBODY>
              <TR align=middle>
                <TD><INPUT name=pi onclick="inputfunction('pi','pi')" style="COLOR: blue" type=button value=" PI "> 
                </TD>
                <TD><INPUT name=e onclick="inputfunction('e','e')" style="COLOR: blue" type=button value=" E  "> 
                </TD>
                <TD><INPUT name=bt onclick="inputfunction('dms','deg')" style="COLOR: #ff00ff" type=button value=d.ms> 
                </TD></TR>
              <TR align=middle>
                <TD><INPUT onclick=addbracket() style="COLOR: #ff00ff" type=button value=" (  "> 
                </TD>
                <TD><INPUT onclick=disbracket() style="COLOR: #ff00ff" type=button value=" )  "> 
                </TD>
                <TD><INPUT name=ln onclick="inputfunction('ln','exp')" style="COLOR: #ff00ff" type=button value=" ln "> 
                </TD></TR>
              <TR align=middle>
                <TD><INPUT name=sin onclick="inputtrig('sin','arcsin','hypsin','ahypsin')" style="COLOR: #ff00ff" type=button value="sin "> 
                </TD>
                <TD><INPUT onclick="operation('^',7)" style="COLOR: #ff00ff" type=button value="x^y "> 
                </TD>
                <TD><INPUT name=log onclick="inputfunction('log','expdec')" style="COLOR: #ff00ff" type=button value="log "> 
                </TD></TR>
              <TR align=middle>
                <TD><INPUT name=cos onclick="inputtrig('cos','arccos','hypcos','ahypcos')" style="COLOR: #ff00ff" type=button value="cos "> 
                </TD>
                <TD><INPUT name=cube onclick="inputfunction('cube','cubt')" style="COLOR: #ff00ff" type=button value="x^3 "> 
                </TD>
                <TD><INPUT onclick="inputfunction('!','!')" style="COLOR: #ff00ff" type=button value=" n! "> 
                </TD></TR>
              <TR align=middle>
                <TD><INPUT name=tan onclick="inputtrig('tan','arctan','hyptan','ahyptan')" style="COLOR: #ff00ff" type=button value="tan "> 
                </TD>
                <TD><INPUT name=sqr onclick="inputfunction('sqr','sqrt')" style="COLOR: #ff00ff" type=button value="x^2 "> 
                </TD>
                <TD><INPUT onclick="inputfunction('recip','recip')" style="COLOR: #ff00ff" type=button value="1/x "> 
                </TD></TR></TBODY></TABLE></TD>
          <TD width=30></TD>
          <TD>
            <TABLE>
              <TBODY>
              <TR>
                <TD><INPUT onclick=putmemory() style="COLOR: red" type=button value=" 储存 "> 
                </TD></TR>
              <TR>
                <TD><INPUT onclick=getmemory() style="COLOR: red" type=button value=" 取存 "> 
                </TD></TR>
              <TR>
                <TD><INPUT onclick=addmemory() style="COLOR: red" type=button value=" 累存 "> 
                </TD></TR>
              <TR>
                <TD><INPUT onclick=multimemory() style="COLOR: red" type=button value=" 积存 "> 
                </TD></TR>
              <TR>
                <TD height=33><INPUT onclick=clearmemory() style="COLOR: red" type=button value=" 清存 "> 
                </TD></TR></TBODY></TABLE></TD>
          <TD width=30></TD>
          <TD>
            <TABLE>
              <TBODY>
              <TR align=middle>
                <TD><INPUT name=k7 onclick="inputkey('7')" style="COLOR: blue" type=button value=" 7 "> 
                </TD>
                <TD><INPUT name=k8 onclick="inputkey('8')" style="COLOR: blue" type=button value=" 8 "> 
                </TD>
                <TD><INPUT name=k9 onclick="inputkey('9')" style="COLOR: blue" type=button value=" 9 "> 
                </TD>
                <TD><INPUT onclick="operation('/',6)" style="COLOR: red" type=button value=" / "> 
                </TD>
                <TD><INPUT onclick="operation('%',6)" style="COLOR: red" type=button value=取余> 
                </TD>
                <TD><INPUT onclick="operation('&amp;',3)" style="COLOR: red" type=button value=" 与 "> 
                </TD></TR>
              <TR align=middle>
                <TD><INPUT name=k4 onclick="inputkey('4')" style="COLOR: blue" type=button value=" 4 "> 
                </TD>
                <TD><INPUT name=k5 onclick="inputkey('5')" style="COLOR: blue" type=button value=" 5 "> 
                </TD>
                <TD><INPUT name=k6 onclick="inputkey('6')" style="COLOR: blue" type=button value=" 6 "> 
                </TD>
                <TD><INPUT onclick="operation('*',6)" style="COLOR: red" type=button value=" * "> 
                </TD>
                <TD><INPUT name=floor onclick="inputfunction('floor','deci')" style="COLOR: red" type=button value=取整> 
                </TD>
                <TD><INPUT onclick="operation('|',1)" style="COLOR: red" type=button value=" 或 "> 
                </TD></TR>
              <TR align=middle>
                <TD><INPUT onclick="inputkey('1')" style="COLOR: blue" type=button value=" 1 "> 
                </TD>
                <TD><INPUT name=k2 onclick="inputkey('2')" style="COLOR: blue" type=button value=" 2 "> 
                </TD>
                <TD><INPUT name=k3 onclick="inputkey('3')" style="COLOR: blue" type=button value=" 3 "> 
                </TD>
                <TD><INPUT onclick="operation('-',5)" style="COLOR: red" type=button value=" - "> 
                </TD>
                <TD><INPUT onclick="operation('<',4)" style="COLOR: red" type=button value=左移> 
                </TD>
                <TD><INPUT onclick="inputfunction('~','~')" style="COLOR: red" type=button value=" 非 "> 
                </TD></TR>
              <TR align=middle>
                <TD><INPUT onclick="inputkey('0')" style="COLOR: blue" type=button value=" 0 "> 
                </TD>
                <TD><INPUT onclick=changeSign() style="COLOR: blue" type=button value=+/-> 
                </TD>
                <TD><INPUT name=kp onclick="inputkey('.')" style="COLOR: blue" type=button value=" . "> 
                </TD>
                <TD><INPUT onclick="operation('+',5)" style="COLOR: red" type=button value=" + "> 
                </TD>
                <TD><INPUT onclick=result() style="COLOR: red" type=button value=" ＝ "> 
                </TD>
                <TD><INPUT onclick="operation('x',2)" style="COLOR: red" type=button value=异或> 
                </TD></TR>
              <TR align=middle>
                <TD><INPUT disabled name=ka onclick="inputkey('a')" style="COLOR: blue" type=button value=" A "> 
                </TD>
                <TD><INPUT disabled name=kb onclick="inputkey('b')" style="COLOR: blue" type=button value=" B "> 
                </TD>
                <TD><INPUT disabled name=kc onclick="inputkey('c')" style="COLOR: blue" type=button value=" C "> 
                </TD>
                <TD><INPUT disabled name=kd onclick="inputkey('d')" style="COLOR: blue" type=button value=" D "> 
                </TD>
                <TD><INPUT disabled name=ke onclick="inputkey('e')" style="COLOR: blue" type=button value=" E&#58853;"> 
                </TD>
                <TD><INPUT disabled name=kf onclick="inputkey('f')" style="COLOR: blue" type=button value=" F&#58853;"> 
                </TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></FORM></DIV></BODY></HTML>
 

 

 

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