代碼如下： var sorceStr = "小明:87;小花:81;小紅:97;小天:76;小張:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76"; myarr = new Array(); sorce = new Array(); var sum = 0; myarr = sorceStr.split(";"); for(i=0; i<myarr.length; i++) sorce[i] = myarr[i].substr(3); for(j=0; j<sorce.length; j++) sum = sum+parseInt(sorce[j]); average = Math.floor(sum/sorce.length); document.write("班級平均分為："+average);---------------------------------------------------------------------- var sorceStr = "小明:87;小花:81;小紅:97;小天:76;小張:74;小小:94;小西:90;小伍:76;小迪:64;小曼:76"; myarr = new Array(); sorce = new Array(); var sum = 0; myarr = sorceStr.split(";"); for(i=0; i<myarr.length; i++){ sorce[i] = myarr[i].substr(3);} for(j=0; j<sorce.length; j++){ sum = sum+parseInt(sorce[j]); average = Math.floor(sum/sorce.length); document.write("班級平均分為："+average)};
求碼友們解釋一下for語句加不加花括號的區(qū)別
天瑜CJT
2014-07-18 16:58:00
