最后的平均分不需要取整函数吧,自带的除法就是取整的呀
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | <!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> |