沒有輸出啊
<!DOCTYPE ?HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>流程控制語句</title>
<script type="text/javascript">
var infos=new Array;
infos=[["小A","女"，"21","大一"],
? ? ? ?["小B","男"，"23","大三"],
? ? ? ?["小C","男"，"24","大四"],
? ? ? ?["小D","女"，"21","大一"],
? ? ? ?["小E","女"，"22","大四"],
? ? ? ?["小F","男"，"21","大一"],
? ? ? ?["小G","女"，"22","大二"],
? ? ? ?["小H","女"，"20","大三"],
? ? ? ?["小I","女"，"20","大一"],
? ? ? ?["小J","男"，"20","大三"]
? ? ? ?]
?//第一步把之前的數(shù)據(jù)寫成一個數(shù)組的形式,定義變量為?
for(i=0;i<infos.length;i++)
{if(infos[i][3])==="大一"&&infos[i][1]==="女"){
? ??
? ? document.write(姓名是：+infos[i][0])
}}
?//第一次篩選，找出都是大一的信息
?
??
?//第二次篩選，找出都是女生的信息
?
?
??
</script>
</head>
<body>
</body>
</html>
2015-10-30
符號都不對啊，可是沒輸出。。。