<!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 date = new Date();
var Y = date.getFullYear(),
M = date.getMonth() + 1,
D = date.getDate(),
d = date.getDay();
switch(d){
case 0:
d = "日";
break;
case 1:
d = "一";
break;
case 2:
d = "二";
break;
case 3:
d = "三";
break;
case 4:
d = "四";
break;
case 5:
d = "五";
break;
case 6:
d = "六";
break;
default:
break;
}
document.write(Y + "年" + M + "月" + D + "日" + "星期" + d);
document.write("<br>")
//成绩是一长串的字符串不好处理，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 score = scoreStr.split(";");
for(var i = 0; i<score.length; i++) {
score[i] = score[i].split(":");
}
console.log(score);
//从数组中将成绩撮出来，然后求和取整，并输出。
var arr = new Array(),
sum = 0;
for(var i = 0; i<score.length; i++) {
arr.push(score[i][1]);
sum += parseFloat(arr[i]);
}
document.write("总分： " + sum);
document.write("<br>")
var aver = Math.round(sum/(arr.length));
document.write("平均分： " + aver);
</script>
</head>
<body>
</body>
</html>总分815 10个学生 平均应该是81.5 咋能是整数呢?