Calculator-JavaConsole_And_WebPage/ScientificCalculator.html at main · giriraj-g0511/Calculator-JavaConsole_And_WebPage · GitHub

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<!DOCTYPE html>
<html>
<head>
    <link rel="stylesheet" type="text/css" href="./ScientificCalculatorStyle.css">
    <link rel="icon" type="image/svg" href="https://upload.wikimedia.org/wikipedia/commons/1/1e/Calculator_icon.svg">
	<title>Scientific Calculator</title>
</head>

<body>
    <div class="window">
        <div class="back">
            <form>
                <p class="brand">CALCI</p>
                <div class="inop">
                    <input type="text" name="op" class="output" disabled="" placeholder="0" id="op">
                </div>

                <div class="first" align="center">
                    <input type="button" name="operator" class="in" value="X²" onclick="op.value+='**2'">
                    <input type="button" name="operator" class="in" value="X³" onclick="op.value+='**3'">
                    <input type="button" name="operator" class="in" value="nCr" onclick="op.value+='nCr'">
                    <input type="button" name="operator" class="in" value="X^" onclick="op.value+='**'">
                    <input class="in red" type="button" name="c" value="C" onclick="op.value=op.value.slice(0,-1)">
                    <input class="in red" type="button" name="ac" value="AC" onclick="op.value=''">
                </div>
                <div class="first" align="center">
                    <input type="button" name="operator" class="in" value="√" onclick="op.value='Math.sqrt(' + op.value + ')';">
                    <input type="button" name="operator" class="in" value="∛" onclick="op.value='Math.cbrt(' + op.value + ')';">
                    <input type="button" name="operator" class="in" value="nPr" onclick="op.value+='nPr'">
                    <input type="button" name="operator" class="in" value="X!" onclick="op.value+='!'">
                    <input type="button" name="operator" class="in" value="(" onclick="op.value+='(';">
                    <input type="button" name="operator" class="in" value=")" onclick="op.value+=')';">
                </div>

                <div class="first" align="center">
                    <input class="in" type="button" name="num" value="7" onclick="op.value+='7'">
                    <input class="in" type="button" name="num" value="8" onclick="op.value+='8'">
                    <input class="in" type="button" name="num" value="9" onclick="op.value+='9'">
                    <input type="button" name="operator" class="in" value="sin" onclick="op.value='Math.sin(degToRad(' + op.value + '))'">
                    <input type="button" name="operator" class="in" value="cos" onclick="op.value='Math.cos(degToRad(' + op.value + '))'">
                    <input type="button" name="operator" class="in" value="tan" onclick="op.value='Math.tan(degToRad(' + op.value + '))'">
                </div>

                <div align="center">
                    <input class="in" type="button" name="num" value="6" onclick="op.value+='6'">
                    <input class="in" type="button" name="num" value="5" onclick="op.value+='5'">
                    <input class="in" type="button" name="num" value="4" onclick="op.value+='4'">
                    <input class="in" type="button" name="operator" value="-" onclick="op.value+='-'">
                    <input class="in" type="button" name="operator" value="X" onclick="op.value+='*'">
                    <input class="in" type="button" name="operator" value="/" onclick="op.value+='/'">
                </div>

                <div style="display: flex;">
                    <div style="width:84%;justify-content: space-around;">
                        <div class="first" align="center">
                            <input class="in" type="button" name="num" value="3" onclick="op.value+='3'">
                            <input class="in" type="button" name="num" value="2" onclick="op.value+='2'">
                            <input class="in" type="button" name="num" value="1" onclick="op.value+='1'">
                            <input class="in" type="button" name="operator" value="&#8508;" onclick="op.value+='3.14'">
                            <input type="button" class="in" name="operator" value="%" onclick="op.value+='/' + 100">
                        </div>

                        <div class="first" align="center">
                            <input class="in" type="button" name="num" value="0" onclick="op.value+='0'">
                            <input class="in" type="button" name="num" value="00" onclick="op.value+='00'">
                            <input class="in" type="button" name="num" value="." onclick="op.value+='.'">
                            <input class="in" style="width: 23vh;" type="button" name="oprtr" value="=" onclick="calculate()">
                        </div>

                    </div>

                    <div>
                        <input class="in" style="height: 21.4vh;margin-left: -11px;" name="operator" type="button" value="+" onclick="op.value+='+'">
                    </div>
                </div>


            </form>
        </div>
    </div>

    <script>
        function calculate() {
            let expression = op.value;

            const factorialRegex = /(\d+)!/g;
            expression = expression.replace(factorialRegex, (match, p1) => factorial(parseInt(p1)));

            const nCrRegex = /(\d+)nCr(\d+)/g;
            expression = expression.replace(nCrRegex, (match, p1, p2) => nCr(parseInt(p1), parseInt(p2)));

            const nPrRegex = /(\d+)nPr(\d+)/g;
            expression = expression.replace(nPrRegex, (match, p1, p2) => nPr(parseInt(p1), parseInt(p2)));

            try {
                op.value = eval(expression);
            } catch (error) {
                op.value = 'Error';
            }
        }

        function factorial(n) {
            if (n < 0) return NaN;
            if (n === 0) return 1;
            let result = 1;
            for (let i = 1; i <= n; i++) {
                result *= i;
            }
            return result;
        }

        function nCr(n, r) {
            return factorial(n) / (factorial(r) * factorial(n - r));
        }

        function nPr(n, r) {
            return factorial(n) / factorial(n - r);
        }

        function degToRad(degrees) {
            return degrees * (Math.PI / 180);
        }
    </script>
</body>
</html>