要多练习~
//通过javascript的日期对象来得到当前的日期,并输出。
var timer = new Date();
var y = timer.getFullYear();
var m = timer.getMonth()+1;
var r = timer.getDate()
var d = timer.getDay();
var days = ["星期日","星期一","星期二","星期三","星期四","星期五","星期六"];
document.write(y + "年" + m + "月" + r +"日"+days[d]+"--");
//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 scoreStrs = scoreStr.split(";");
//document.write(scoreStrs[0].substring(scoreStrs[0].indexOf(":")+1)))
//从数组中将成绩撮出来,然后求和取整,并输出。
var sum = 0;
for(i = 0;i < scoreStrs.length; i++){
sum = sum + parseInt(scoreStrs[i].substring(scoreStrs[i].indexOf(":")+1));
}
document.write("班级总分:"+ sum + "班级平均分:" + Math.round(sum/scoreStrs.length));