今天是10.1，请问为什么我的日期显示9.1？
柯哀志闲
2018-10-01 21:47
<!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 date1=new Date(); var myyear=date1.getFullYear(); var mymonth=date1.getMonth(); var myday=date1.getDay(); 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(myyear+"年"+mymonth+"月"+myday+"日"+" "+weekday[myday]); //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"] ] //从数组中将成绩撮出来，然后求和取整，并输出。 var sum=0; for(var a=0;a<scoreStr.length;a++){ sum=sum+parseInt(scoreStr[a][1]); } var av=sum/(scoreStr.length); document.write("--"+"班级平均分为:"+Math.floor(av));</script></head><body></body></html>3回答
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- 前端小白多多关照
- 2018-10-29 00:00:53
为什么最后要向下取整呢
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- qq_鹿苑今生晗情此世_0
- 2018-10-08 09:53:26
getMonth()方法获取的月份是从0开始的，0代表一月，1代表二月，以此类推，所以应该加1
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- 柯哀志闲
- 2018-10-01 21:48:45
<!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 date1=new Date();
var myyear=date1.getFullYear();
var mymonth=date1.getMonth();
var myday=date1.getDay();
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(myyear+"年"+mymonth+"月"+myday+"日"+" "+weekday[myday]);
//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"]
]
//从数组中将成绩撮出来，然后求和取整，并输出。
var sum=0;
for(var a=0;a<scoreStr.length;a++){
sum=sum+parseInt(scoreStr[a][1]);
}
var av=sum/(scoreStr.length);
document.write("--"+"班级平均分为:"+Math.floor(av));
</script>
</head>
<body>
</body>
</html>
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