<!DOCTYPE?html>
<html>
<head>
<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>
<title>Math?</title>
<script?type="text/javascript">
var?mystr=[3.3,-0.1,-9.9,8.9];
for(var?substr?in?mystr)
{
????document.write(Math.ceil(substr)+"<br>");
}
</script>
</head>
<body>
</body>
</html>是遍歷有問題嗎？
為什么結(jié)果是0123
_Capricornna
2016-07-15 16:12:21
