closedsource/half_adder.html at master · pikatchu/closedsource · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Half Adder Visualization</title>
    <style>
        body {
            text-align: center;
            font-family: Arial, sans-serif;
        }
        canvas {
            border: 1px solid black;
        }
    </style>
</head>
<body>
    <h1>Half Adder Visualization</h1>
    <label for="inputA">A:</label>
    <input type="checkbox" id="inputA" onchange="updateCanvas()">
    <label for="inputB">B:</label>
    <input type="checkbox" id="inputB" onchange="updateCanvas()">
    <br><br>
    <canvas id="canvas" width="500" height="300"></canvas>

    <script>
        const canvas = document.getElementById("canvas");
        const ctx = canvas.getContext("2d");

        function drawGate(x, y, label) {
            ctx.fillStyle = "black";
            ctx.fillText(label, x, y - 10);
            ctx.strokeRect(x, y, 60, 40);
        }

        function drawWire(x1, y1, x2, y2) {
            ctx.beginPath();
            ctx.moveTo(x1, y1);
            ctx.lineTo(x2, y2);
            ctx.stroke();
        }

        function drawCircle(x, y) {
            ctx.beginPath();
            ctx.arc(x, y, 5, 0, Math.PI * 2);
            ctx.fill();
        }

        function updateCanvas() {
            ctx.clearRect(0, 0, canvas.width, canvas.height);

            const A = document.getElementById("inputA").checked ? 1 : 0;
            const B = document.getElementById("inputB").checked ? 1 : 0;
            const Sum = A ^ B;  // XOR for sum
            const Carry = A & B; // AND for carry

            ctx.font = "16px Arial";
            ctx.fillText("Half Adder", 200, 30);

            ctx.fillText("A = " + A, 50, 80);
            ctx.fillText("B = " + B, 50, 120);

            drawWire(80, 80, 150, 80);
            drawWire(80, 120, 150, 120);

            drawGate(150, 60, "XOR");
            drawGate(150, 140, "AND");

            drawWire(210, 80, 270, 80);
            drawWire(210, 160, 270, 160);

            ctx.fillText("Sum = " + Sum, 280, 85);
            ctx.fillText("Carry = " + Carry, 280, 165);

            drawCircle(270, 80);
            drawCircle(270, 160);
        }

        updateCanvas();
    </script>
</body>
</html>