可参考代码~
慕容3570878
2020-09-13 16:01
<!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 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 mystr = "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 myscr = mystr.split(";");
//从数组中将成绩撮出来，然后求和取整，并输出。
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("--班级总分为:"+Math.floor(sum/count));
}
</script>
</head>
<body>
</body>
</html>
2回答
-
- 仅慕
- 2021-02-07 11:33:10
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 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>");
// 计算今天的日期
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>");
-
- qq_慕斯卡2388603
- 2020-09-27 15:16:17
<!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 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 mystr = "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 myscr = mystr.split(";"); // document.write(myscr) //从数组中将成绩撮出来，然后求和取整，并输出。 var sum = 0; //取出值的和 var count = 0; //循环次数相等于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("--班级平均分为:"+Math.floor(sum/count) + "<br/>"); document.write("--班级总分为:"+Math.floor(sum) + "<br/>"); document.write("--统计人数为:"+Math.floor(count) + "<br/>"); } </script></head><body></body></html>
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