求高手解答,急
<title>系好安全帶,準備啟航</title>
<script type="text/javascript">
? var myday = 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(myday.getFullYear() + "年" + myday.getMonth() + "月" + myday.getDate() + "日"+weekday[myday.getDay()]);
?
? var scoreStr = "小明:87;小花:81;小紅:97;小天:76;小張:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76";
? var all=scoreStr.split(";");
? ?var sum=0;
for (var i = 0; i < all.length; i ++) {
? ? ? ?sum += parseInt(all[i].substr(all[i].indexOf(":")+1));
? ? ? ?//document.write("<br>" + sum);//test
? ?}
? document.write(sum+"</br>");
? document.write(all.length+"</br>")
??
? document.write(Math.round(sum/all.length));
??
</script>
</head>
<body>
請教高手,為什么我最后哪里不加parseInt就沒有結(jié)果了,明明是兩個數(shù)字類型???help。
2017-05-13
沒太聽懂你要問什么