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我觉得我写的也没错，可是输出平均分是82，不是81

//通过javascript的日期对象来得到当前的日期，并输出。

var one = new Date();

var two = ["星期日", "星期一", "星期二", "星期三", "星期四", "星期五", "星期六"];

//成绩是一长窜的字符串不好处理，找规律后分割放到数组里更好操作哦

var scoreStr = "小明:87;小花:81;小红:97;小天:76;小张:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76";

var $one = scoreStr.substring(3, 5);

var $two = scoreStr.substring(9, 11);

var $three = scoreStr.substring(15, 17);

var $four = scoreStr.substring(21, 23);

var $five = scoreStr.substring(27, 29);

var $six = scoreStr.substring(33, 35);

var $seven = scoreStr.substring(39, 41);

var $eight = scoreStr.substring(45, 47);

var $nine = scoreStr.substring(51, 53);

var $ten = scoreStr.substring(57, 59);

var three = [$one, $two, $three, $four, $five, $six, $seven, $eight, $nine, $ten];

//从数组中将成绩撮出来，然后求和取整，并输出。

var sum = 0;

for(var i = 0; i < three.length; i++) {

sum = sum + parseInt(three[i]);

}

document.write(one.getFullYear() + "年" + one.getMonth() + "月" + one.getDate() + "日" + " " + two[one.getDay()] + "--班级总分为：" + Math.round(sum / 10));

</script>

慕工程8176175

2019-04-24

源自：JavaScript进阶篇 7-23

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3 回答

小胖恩仔
2019-06-21

<!DOCTYPE HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>系好安全带,准备启航</title>

<script type="text/javascript">

//通过javascript的日期对象来得到当前的日期，并输出。

var mydate=new Date();
var weekend=["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
var year=mydate.getFullYear();
var month=mydate.getMonth();
var day=mydate.getDay();
document.write(year+"年"+month+"月"+day+"日"+weekend[mydate.getDay()]+"<br>" )

//成绩是一长窜的字符串不好处理，找规律后分割放到数组里更好操作哦
var scoreStr = "小明:87;小花:81;小红:97;小天:76;小张:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76";
var enen = scoreStr.split(";");

var sum = 0;
for(var i=0;i<enen.length;i++){
var num = enen[i].substring(3);
sum+=parseInt(num);
}
document.write(sum+"<br>");

//从数组中将成绩撮出来，然后求和取整，并输出。
document.write(Math.floor(sum/enen.length))

</script>
</head>
<body>
</body>
</html>