<!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 weekday = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"]; var myDay = new Date(); var year = myDay.getFullYear(); var month = myDay.getMonth(); var date = myDay.getDate(); var week = weekday[myDay.getDay()]; //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 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 myStr = scoreStr.split(";"); var sum=0; for (var i = 0; i < myStr.length; i++) { var score = parseInt(myStr[i].substr(-2)); sum = sum + score; } //从数组中将成绩撮出来,然后求和取整,并输出。 document.write(year+"年"+month+"月"+date+"日 "+week+"--班级总分为:"+sum); </script> </head> <body> </body> </html>
利用数组的索引和数组对应的数值来运算!