<!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 day = new Date() var weekday = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"] document.write( day.getFullYear() + "年" + (day.getMonth() + 1) + "月"+ day.getDate() + "日"+ weekday[day.getDay()] + "班级总分为:"+ sum + " " + "平均分为:"+ b ) //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 list = scoreStr.split(";") //从数组中将成绩撮出来,然后求和取整,并输出。 var sum = 0 var b = 0 for(var i = 0; i < list.length; i++){ sum += parseInt(list[i].substr(list[i].indexOf(":")+1)) } b = sum / list.length </script> </head> <body> </body> </html>
顺序不对
<!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 sum = 0;
var b = 0;
//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 list = scoreStr.split(";");
//console.info(list);
//alert(list.length);
// alert(parseInt(list[1].substring(list[1].indexOf(":")+1)));
//从数组中将成绩撮出来,然后求和取整,并输出。
for(var i = 0; i < list.length; i++){
sum += parseInt(list[i].substring(list[i].indexOf(":")+1));
}
b = sum / list.length;
var day = new Date();
var weekday = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
document.write(
day.getFullYear() + "年" +
(day.getMonth() + 1) + "月"+
day.getDate() + "日"+
weekday[day.getDay()] + "班级总分为:"+ sum + " " + "平均分为:"+ b
);
</script>
</head>
<body>
</body>
</html>
上面这个是对的。
10/11/17/25行缺分号