任意进制 数值 权展开式 西格玛 web html 源码
这是一段html代码 用于理解 数值权展开式的
<!DOCTYPE html>
<html lang="en">
<head><meta charset="UTF-8"><title>任意进制 数值 权展开式</title>
</head>
<body>
<div style="width: 100%;text-align: center;margin-top: 20rem;"><select name="" id="hex"><option value="10">十进制</option><option value="16">十六进制</option><option value="2" selected>二进制</option></select><input type="text" placeholder="数值" id="num"><button onclick="weight_click()">点击展开权</button><table><thead><tr><th>位数</th><th>数值</th><th>数权</th><th>数值 * 数权</th></tr></thead><tbody id="tbody"></tbody><tr></tr></table>
</div><style>html,body{width: 100%;height: 100%;}body{display: flex;justify-content: center;align-content: center;}table{width: 50%;margin: auto;}tr,td,th{border: 1px #eee solid;padding: 0;box-sizing: border-box;text-align: center;}
</style>
<script>function weight_click(){let hexDom = document.getElementById('hex');let hex = hexDom.options[hexDom.selectedIndex].value;let val = document.getElementById('num').value;weight(hex, val);}function weight(hex, num){let temp = num.toString();temp = temp.split('.');let integer = temp[0].split('').reverse();let decimal = temp[1];let max_num = integer.length;let min_num = 0;if (decimal !== undefined) {decimal = decimal.split('').reverse()min_num = -decimal.length;}let res = [];for (let i = min_num; i < max_num; i++) {let val;if (i < 0) {val = decimal[Math.abs(i) - 1];res[i + Math.abs(min_num)] = {math: `${val} * ${hex} ^ -${Math.abs(i)}`,weight: ` ${hex} ^ -${Math.abs(i)}`,number: val,index: -Math.abs(i)}// res[i + decimal.length] = `Math.pow(${decimal[Math.abs(i) - 1]}, -${Math.abs(i)})`;}else{val = integer[i];res[i + Math.abs(min_num)] = {math: `${val} * ${hex} ^ ${i}`,weight: `${hex} ^ ${i}`,number: val,index: i}// res[i + decimal.length] = `Math.pow(${integer[i]}, ${i})`;}}let html = [];res.forEach(item => {html.push("")html.push(`<td>${item.index}</td>`)html.push(`<td>${item.number}</td>`)html.push(`<td>${item.weight}</td>`)html.push(`<td>${item.math}</td>`)html.push(" ")})document.getElementById('tbody').innerHTML = html.join('');}weight(10, 341.12 );</script>
</body>
</html>
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