慕桂英0247989
2019-02-16 23:50
<!DOCTYPE HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>流程控制语句</title>
<script type="text/javascript">
//二维数组定义
var 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']
];
for(var i=0;i<infos.length;i++){
if(infos[i][3]=="大一")
{
if(infos[i][1]=="女")
{document.write(infos[i][0]+"<br/>");};
}
}
</script>
</head>
<body>
</body>
</html>
["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"],
在每个数组后面加个逗号表示连贯性,不然就会报错
把你代码做了下修改,自己看一下和你的代码差在哪里
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>control</title>
<script type="text/javascript">
//二维数组定义
var 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"],
];
for(var i=0;i<infos.length;i++){
if(infos[i][3]=="大一")
{
if(infos[i][1]=="女")
{document.write(infos[i][0]+"<br/>");};
}
}
</script>
</head>
<body>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>control</title>
<script type="text/javascript">
//二维数组定义
var 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"]
];
for(var i=0;i<infos.length;i++){
if(infos[i][3]=="大一")
{
if(infos[i][1]=="女")
{document.write(infos[i][0]+"<br/>");};
}
}
</script>
</head>
<body>
</body>
</html>
这个代码里的姓名,性别和年级都要用双引号,你定义的时候用的是单引号,改一下,对了请采纳,错了发改过的代码,我再帮你改改
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