没整理 好乱 凑活看吧 用来计算这个崩溃大陆修改的 方便了好多 自动复制 自动转换
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<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title></title>
</head>
<body>
<h1>双浮点计算</h1>原始数据：
<form>
<input id="num1" type="text" value="1" onkeyup="count(this);" /><br />
双浮点数据： <input id="result1" type="text" value="1072693248" /><br />
<input id="ger" type="button" value="转换" /><button class="copy">复制内容</button><br />
<button class="copy2">复制最大内容</button> <script language="javascript" type="text/javascript">
<script language="javascript">
function count(el)
{
gogogo();
copy(document.getElementById("result1").value);
document.getElementById("num1").focus();
}
function copy(text) {
var text=window.document.getElementById("result1").value;
copyTextToClipboard(text)
}
var copyBtn = document.querySelector('.copy2')
//1088611872
// 点击的时候调用 copyTextToClipboard() 方法就好了.
copyBtn.onclick = function() {
//var text=window.document.getElementById("result1").value;
copyTextToClipboard('1088611872')
}
var copyBtn = document.querySelector('.copy')
//1088611872
// 点击的时候调用 copyTextToClipboard() 方法就好了.
copyBtn.onclick = function() {
var text=window.document.getElementById("result1").value;
copyTextToClipboard(text)
}
var Iger = window.document.getElementById("ger");
var r = window.document.getElementById("result1");
Iger.onclick = gogogo;
function checkNum() {
var vnum1 = window.document.getElementById("num1").value;
return isNaN(vnum1) ? null : vnum1;
}
function cal(a) {
if (a != null)
return 1072693248
+ Math.pow(2, (20 - Math.floor(Math.log(a)
/ Math.log(2))))
* (a - Math.pow(2, (Math.floor(Math.log(a)
/ Math.log(2))))) + Math.pow(2, 20)
* Math.floor(Math.log(a) / Math.log(2));
else
return null;
}
function coutRes(b) {
if (b != null)
r.value = b;
else
r.value = "输入错误";
}
function gogogo() {
r.value = "";
coutRes(cal(checkNum()));
}
function copyTextToClipboard(text) {
var textArea = document.createElement("textarea")
textArea.style.position = 'fixed'
textArea.style.top = 0
textArea.style.left = 0
textArea.style.width = '2em'
textArea.style.height = '2em'
textArea.style.padding = 0
textArea.style.border = 'none'
textArea.style.outline = 'none'
textArea.style.boxShadow = 'none'
textArea.style.background = 'transparent'
textArea.value = text
document.body.appendChild(textArea)
textArea.select()
try {
var msg = document.execCommand('copy') ? '成功' : '失败'
console.log('复制内容 ' + msg)
} catch (err) {
console.log('不能使用这种方法复制内容')
}
document.body.removeChild(textArea)
}
</script>
</form>
</body>
</html>