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# Decimal_conversion

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<!DOCTYPE html>
<html lang="zh">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>进制转换器</title>
<link rel="stylesheet" href="styles.css">
</head>
<body>
<div class="container">
<h1>进制转换器</h1>
<label for="inputNumber">输入数字:</label>
<input type="text" id="inputNumber" required>
<label for="fromBase">初始进制 (2-16):</label>
<input type="number" id="fromBase" min="2" max="16" required>
<label for="toBase">目标进制 (2-16):</label>
<input type="number" id="toBase" min="2" max="16" required>
<button onclick="convertBase()">转换</button>
<p id="result"></p >
</div>
<script src="script.js"></script>
</body>
</html>

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function convertBase() {
const inputNumber = document.getElementById('inputNumber').value.trim();
const fromBase = parseInt(document.getElementById('fromBase').value);
const toBase = parseInt(document.getElementById('toBase').value);
// 验证输入数字是否符合fromBase的规则
if (!isValidNumber(inputNumber, fromBase)) {
alert('输入的数字无效!请检查其进制格式。');
return;
}
// 将输入的数字从fromBase转换为十进制
const decimalValue = parseInt(inputNumber, fromBase);
// 将十进制数转换为toBase
const result = decimalValue.toString(toBase).toUpperCase();
document.getElementById('result').textContent = `转换结果: ${result}`;
}
function isValidNumber(num, base) {
const validChars = '0123456789ABCDEF'.slice(0, base);
for (let char of num.toUpperCase()) {
if (!validChars.includes(char)) {
return false;
}
}
return true;
}
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