Calculator PHP

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a year ago
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<!DOCTYPE html>
<html>
<head>
    <title>Calculadora Científica</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-color: #f2f2f2;
        }
        .calculator {
            width: 400px;
            margin: 50px auto;
            padding: 20px;
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
        }
        input[type="text"] {
            width: 79%;
            padding: 10px;
            margin-bottom: 10px;
            border: 1px solid #ccc;
            border-radius: 5px;
        }
        .btn {
            display: inline-block;
            width: 70px;
            height: 40px;
            margin: 5px;
            text-align: center;
            line-height: 40px;
            border: 1px solid #ccc;
            border-radius: 5px;
            cursor: pointer;
        }
        #equals {
            background-color: #abf7ad;
            color: white;
        }
    </style>
</head>
<body>
    <div class="calculator">
        <input type="text" id="display" disabled>
        <div>
            <div class="btn" onclick="appendText('7')">7</div>
            <div class="btn" onclick="appendText('8')">8</div>
            <div class="btn" onclick="appendText('9')">9</div>
            <div class="btn" onclick="appendText('/')">/</div>
        </div>
        <div>
            <div class="btn" onclick="appendText('4')">4</div>
            <div class="btn" onclick="appendText('5')">5</div>
            <div class="btn" onclick="appendText('6')">6</div>
            <div class="btn" onclick="appendText('*')">*</div>
        </div>
        <div>
            <div class="btn" onclick="appendText('1')">1</div>
            <div class="btn" onclick="appendText('2')">2</div>
            <div class="btn" onclick="appendText('3')">3</div>
            <div class="btn" onclick="appendText('-')">-</div>
        </div>
        <div>
            <div class="btn" onclick="appendText('0')">0</div>
            <div class="btn" onclick="appendText('.')">.</div>
            <div class="btn" id="equals" onclick="calculate()">=</div>
            <div class="btn" onclick="appendText('+')">+</div>
        </div>
        <div>
            <div class="btn" onclick="appendText('Math.sqrt(')">√</div>
            <div class="btn" onclick="appendText('Math.pow(')">x²</div>
            <div class="btn" onclick="appendText('Math.pow(')">x³</div>
            <div class="btn" onclick="appendText('Math.pow(')">xʸ</div>
            <div class="btn" onclick="appendText('Math.exp(')">eˣ</div>
            <div class="btn" onclick="appendText('Math.log10(')">log</div>
            <div class="btn" id="clear" onclick="clearDisplay()">C</div>
            <div class="btn" onclick="appendText('(')">(</div>
            <div class="btn" onclick="appendText(')')">)</div>
        </div>
    </div>

    <script>
        function appendText(text) {
            const display = document.getElementById('display');
            display.value += text;
        }

        function calculate() {
            const display = document.getElementById('display');
            try {
                display.value = eval(display.value);
            } catch (error) {
                display.value = 'Error';
            }
        }

        function clearDisplay() {
            const display = document.getElementById('display');
            display.value = '';
        }
    </script>
</body>
</html>