可參考代碼~
<!DOCTYPE? HTML>
<html >
<head>
? <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
? <title>系好安全帶,準(zhǔn)備啟航</title>
? <script type="text/javascript">
? ? //通過javascript的日期對(duì)象來得到當(dāng)前的日期，并輸出。
? ? var mydate = 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"];
? ? var myweek=weekday[mydate.getDay()];
? ? var mymonth = mydate.getMonth()+1;
? ? document.write(mydate.getFullYear()+"年"+mymonth+"月"+mydate.getDate()+"日"+" "+myweek);
? ? //成績是一長竄的字符串不好處理，找規(guī)律后分割放到數(shù)組里更好操作哦
? ? var mystr = "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 myscr = mystr.split(";");
? ? //從數(shù)組中將成績撮出來，然后求和取整，并輸出。
? ? var i = 0, sum = 0, count = 0;
? ? for(i ;i<myscr.length;i++){
? ? ? ? var index = myscr[i].indexOf(":");
? ? ? sum += parseInt(myscr[i].substr(index+1));
? ? ? count ++;
? ? }
? ? if(count != 0){
? ? ? ? document.write("--班級(jí)總分為:"+Math.floor(sum/count));
? ? }
? </script>
</head>
<body>
</body>
</html>
2021-02-07
?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 score= new Array();
? score=scoreStr.split(";");
? var sum=0;
?for(var i=0;i<score.length;i++){
? ?sum=sum+parseFloat(score[i].substr(-2));?
?}
? var score_vag=parseInt(sum/score.length);
?document.write(score_vag+"<br>");
// 計(jì)算今天的日期
var date =new Date();
var year=date.getFullYear();
var moth=date.getMonth();
var day =date.getDate();
var week = date.getDay();
var weekday =["星期日","星期一","星期二","星期三","星期四","星期五","星期六",];
var w=weekday[week];
var today=year+"年"+moth+"月"+day+"日"+" "+w
document.write(today+"<br>");
2020-09-27
<!DOCTYPE??HTML><html?><head>??<meta?http-equiv="Content-Type"?content="text/html;?charset=utf-8"?/>??<title>系好安全帶,準(zhǔn)備啟航</title>??<script?type="text/javascript">????//通過javascript的日期對(duì)象來得到當(dāng)前的日期，并輸出。????var?mydate?=?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"];????var?myweek=weekday[mydate.getDay()];????var?mymonth?=?mydate.getMonth()+1;????document.write(mydate.getFullYear()+"年"+mymonth+"月"+mydate.getDate()+"日"+"?"+myweek??+?"<br/>");????//成績是一長竄的字符串不好處理，找規(guī)律后分割放到數(shù)組里更好操作哦????var?mystr?=?"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?myscr?=?mystr.split(";");????//?document.write(myscr)????//從數(shù)組中將成績撮出來，然后求和取整，并輸出。????var?sum?=?0;???//取出值的和????var?count?=?0;?//循環(huán)次數(shù)相等于length????for(var?i?=0;?i<myscr.length;?i++){????????//?console.log(myscr.length)??????????//10????????var?index?=?myscr[i].indexOf(":");????????//?console.log(index)?//2??myscr[i]?=?10,?indexOf("?:?")?=?2??????sum?+=?parseInt(myscr[i].substr(index+1));??????count?++;????}????if(count?!=?0){????????document.write("--班級(jí)平均分為:"+Math.floor(sum/count)?+?"<br/>");????????document.write("--班級(jí)總分為:"+Math.floor(sum)??+?"<br/>");????????document.write("--統(tǒng)計(jì)人數(shù)為:"+Math.floor(count)??+?"<br/>");????}??</script></head><body></body></html>