二维数组求平均值,最大值,最小值demo
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title>网页标题</title>
<meta name="keywords" content="关键字列表" />
<meta name="description" content="网页描述" />
<link rel="stylesheet" type="text/css" href="" />
<style type="text/css"></style>
<script type="text/javascript">
//求数组平均值,最大值,最小值
var arr=[
[32,15,23,13],
[23,33,23,12],
[13,23,24,9]
]
//总和值,初始化0
var sum=0;
//总行数值,初始化0
var n=0;
//初始化最大值
var max=arr[0][0];
//初始化最小值
var min=arr[0][0];
for(var i=0;i<arr.length;i++){
for(var j=0;j<arr[i].length;j++){
sum+=arr[i][j];
n++;
if(max<arr[i][j]){//比较最大值 比现有最大值小说明是最大值
//示例:32<33 判断语句真,赋值33是max
max=arr[i][j];
}
if(min>arr[i][j]){//比较最小值 比现有最小值大说明是最小值
//示例:32>12 判断语句真,赋值12是min
min=arr[i][j];
}
}
}document.write("平均值:"+sum/n+"最大值:"+max+"最小值:"+min);
</script>
</head>
<body>
</body>
</html>
三目运算获取最大值demo
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="zh-cn">
<head>
<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
<title>网页标题</title>
<meta name="keywords" content="关键字列表" />
<meta name="description" content="网页描述" />
<link rel="stylesheet" type="text/css" href="" />
<style type="text/css"></style>
<script type="text/javascript">
function genMax(a,b){
var max=a>b?a:b;
document.write(max+"最大<br/>");
}
genMax(50,37);
genMax(50,98);
genMax(42,87);
</script>
</head>
<body>
</body>
</html>
