weixin_慕沐8485017
2020-08-31 10:57
<!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 date = new Date(); var Y = date.getFullYear(), M = date.getMonth() + 1, D = date.getDate(), d = date.getDay(); switch(d){ case 0: d = "日"; break; case 1: d = "一"; break; case 2: d = "二"; break; case 3: d = "三"; break; case 4: d = "四"; break; case 5: d = "五"; break; case 6: d = "六"; break; default: break; } document.write(Y + "年" + M + "月" + D + "日" + "星期" + d); document.write("<br>") //成绩是一长串的字符串不好处理,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"; var score = scoreStr.split(";"); for(var i = 0; i<score.length; i++) { score[i] = score[i].split(":"); } console.log(score); //从数组中将成绩撮出来,然后求和取整,并输出。 var arr = new Array(), sum = 0; for(var i = 0; i<score.length; i++) { arr.push(score[i][1]); sum += parseFloat(arr[i]); } document.write("总分: " + sum); document.write("<br>") var aver = Math.round(sum/(arr.length)); document.write("平均分: " + aver); </script> </head> <body> </body> </html>
总分815 10个学生 平均应该是81.5 咋能是整数呢?
JavaScript进阶篇
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