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74 lines
2.6 KiB
74 lines
2.6 KiB
<!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>进制转换程序</title>
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<style>
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body { font-family: Arial, sans-serif; }
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input { margin-bottom: 10px; }
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</style>
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</head>
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<body>
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<h1>进制转换程序</h1>
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<label for="fromBase">输入进制 (R1):</label>
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<input type="number" id="fromBase" value="10" min="2" max="16"><br>
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<label for="numberX">输入数字 X:</label>
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<input type="text" id="numberX"><br>
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<label for="toBase">转换进制 (R2):</label>
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<input type="number" id="toBase" value="10" min="2" max="16"><br>
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<button onclick="convertBase()">转换</button>
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<h2>转换结果 Y:</h2>
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<p id="result"></p>
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<script>
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function convertBase() {
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// 获取输入值
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const fromBase = parseInt(document.getElementById('fromBase').value);
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const numberX = document.getElementById('numberX').value.trim();
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const toBase = parseInt(document.getElementById('toBase').value);
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// 验证输入
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if (!isValidNumberInBase(numberX, fromBase)) {
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document.getElementById('result').innerText = "输入的数字 X 在指定的进制 R1 中无效！";
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return;
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}
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// 将 X 从 R1 进制转换为十进制
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const decimalValue = parseInt(numberX, fromBase);
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// 将十进制转换为 R2 进制
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const resultY = decimalToBase(decimalValue, toBase);
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// 输出结果
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document.getElementById('result').innerText = resultY;
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}
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function isValidNumberInBase(number, base) {
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const validCharacters = '0123456789ABCDEF'.substring(0, base);
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for (let char of number.toUpperCase()) {
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if (!validCharacters.includes(char)) {
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return false;
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}
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}
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return true;
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}
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function decimalToBase(decimal, base) {
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if (decimal === 0) return '0';
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let result = '';
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while (decimal > 0) {
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const remainder = decimal % base;
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result = (remainder < 10 ? remainder : String.fromCharCode(remainder - 10 + 'A'.charCodeAt(0))) + result;
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decimal = Math.floor(decimal / base);
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}
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return result;
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}
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</script>
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</body>
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</html> |