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<!DOCTYPE html>
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<html lang="zh">
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>进制转换器</title>
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<style>
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body {
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font-family: Arial, sans-serif;
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margin: 20px;
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padding: 20px;
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border: 1px solid #ccc;
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border-radius: 10px;
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max-width: 400px;
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}
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label, input, button {
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display: block;
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margin-bottom: 10px;
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}
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#result {
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font-weight: bold;
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color: #333;
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}
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.error {
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color: red;
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}
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</style>
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</head>
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<body>
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<h2>任意进制转换器</h2>
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<label for="fromBase">输入进制 (2-16):</label>
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<input type="number" id="fromBase" min="2" max="16" required>
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<label for="number">输入数字:</label>
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<input type="text" id="number" placeholder="例如：1010" required>
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<label for="toBase">转换为进制 (2-16):</label>
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<input type="number" id="toBase" min="2" max="16" required>
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<button id="convertButton">转换</button>
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<h3>结果:</h3>
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<div id="result"></div>
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<script>
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document.getElementById('convertButton').addEventListener('click', handleConversion);
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function handleConversion() {
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const fromBase = parseInt(document.getElementById('fromBase').value);
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const number = document.getElementById('number').value.trim();
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const toBase = parseInt(document.getElementById('toBase').value);
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const resultElement = document.getElementById('result');
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// 清除之前的结果和错误信息
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resultElement.textContent = '';
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// 验证输入的数字是否合法
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const validationMessage = validateInput(number, fromBase);
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if (validationMessage) {
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resultElement.textContent = validationMessage;
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resultElement.className = 'error';
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return;
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}
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// 转换为十进制并转换为目标进制
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const decimalValue = parseInt(number, fromBase);
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const convertedValue = decimalValue.toString(toBase).toUpperCase();
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// 显示结果
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resultElement.textContent = convertedValue;
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resultElement.className = ''; // 清除错误样式
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}
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function validateInput(numStr, base) {
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const validChars = '0123456789ABCDEF'.slice(0, base);
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const isValid = [...numStr].every(char => validChars.includes(char.toUpperCase()));
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if (!isValid) {
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return `输入的数字不符合${base}进制规则！`;
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}
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return null;
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}
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</script>
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</body>
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</html>
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