<!DOCTYPE??HTML><html?><head><meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/><title>系好安全帶,準備啟航</title><script?type="text/javascript"> //通過javascript的日期對象來得到當前的日期，并輸出。?? 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]);?? //成績是一長竄的字符串不好處理，找規律后分割放到數組里更好操作哦?? 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"]????]? //從數組中將成績撮出來，然后求和取整，并輸出。?? var?sum=0;?? for(var?a=0;a<scoreStr.length;a++){???? sum=sum+parseInt(scoreStr[a][1]);????}????var?av=sum/(scoreStr.length);????document.write("--"+"班級平均分為:"+Math.floor(av));</script></head><body></body></html>
2018-10-29
為什么最后要向下取整呢
2018-10-08
getMonth()方法獲取的月份是從0開始的，0代表一月，1代表二月，以此類推，所以應該加1
2018-10-01
<!DOCTYPE ?HTML>
<html >
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>系好安全帶,準備啟航</title>
<script type="text/javascript">
//通過javascript的日期對象來得到當前的日期，并輸出。
? 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]);
? //成績是一長竄的字符串不好處理，找規律后分割放到數組里更好操作哦
? 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"]
? ? ]
? //從數組中將成績撮出來，然后求和取整，并輸出。
? var sum=0;
? for(var a=0;a<scoreStr.length;a++){
? ? sum=sum+parseInt(scoreStr[a][1]);
? ? }
? ? var av=sum/(scoreStr.length);
? ? document.write("--"+"班級平均分為:"+Math.floor(av));
</script>
</head>
<body>
</body>
</html>