为啥打印出来的不是和

源自：7-23 编程练习

为啥打印出来的不是和

<!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 today = new Date();
var date = today.getDate();
var mouth = today.getMonth();
var year = today.getYear();
var day = today.getDay();
var weekday = Array(7);
weekday[0] = "星期日";
weekday[1] = "星期一";
weekday[2] = "星期二";
weekday[3] = "星期三";
weekday[4] = "星期四";
weekday[5] = "星期五";
weekday[6] = "星期六";
document.write(year + "年" + mouth + "月" + date + "日" + weekday[day] + "</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 scoreStr = scoreStr.split(";");
for (i = 0;i <= scoreStr.length - 1; i++){
    var arr = scoreStr[i].split(":");
    var nuum = arr[1];
    nuum = parseFloat(nuum);
    var sum = 0;
    sum = sum + nuum;
    document.write(sum);
}

//从数组中将成绩撮出来，然后求和取整，并输出。

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

提问者：qq_楊先生_2 2017-02-06 21:29

为啥打印出来的不是和

个回答