问答详情
源自:7-23 编程练习

怎么分数显示不出来

<!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">

var my=new Date()

  //通过javascript的日期对象来得到当前的日期,并输出。

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

var motch=["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月",]

document.write(my.getFullYear()+"年"+motch[my.getMonth()]+my.getDate()+"号"+weekday[my.getDay()])   

  //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 mn=scoreStr.split(";")

  var sum=0

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

   {sum=sum+parseINt(mn.slice(3,5))}

  //从数组中将成绩撮出来,然后求和取整,并输出。

  var sum1=sum/mn.length

document.write("班级总分为:"+sum+"班级平均分为:"+Math.round(sum1))

</script>

</head>

<body>

</body>

</html>


提问者:海阔天空17 2016-03-20 17:21

个回答

  • 海阔天空17
    2016-03-22 15:36:26

    谢谢!!

  • tzyy
    2016-03-20 17:58:10

    1. split(;)里的“;”要在英文状态下输入;

    2. {sum=sum+parseINt(mn.slice(3,5))}里面的mn应该是mn[i];

    3. 应该是parseInt()而不是parseINt()

    代码:

    <!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">

    var my=new Date()

      //通过javascript的日期对象来得到当前的日期,并输出。

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

    var motch=["一月","二月","三月","四月","五月","六月","七月","八月","九月","十月","十一月","十二月",]

    document.write(my.getFullYear()+"年"+motch[my.getMonth()]+my.getDate()+"号"+weekday[my.getDay()])   

      //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 mn=scoreStr.split(";")

      var sum=0

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

       {sum=sum+parseInt(mn[i].slice(3,5))}

      //从数组中将成绩撮出来,然后求和取整,并输出。

      var sum1=sum/mn.length

    document.write("班级总分为:"+sum+"班级平均分为:"+Math.round(sum1))

    </script>

    </head>

    <body>

    </body>

    </html>