2回答

• 

  慕粉1844174621

  2017-03-03 14:52:39

  /*我也是最进才学的,这是我的方法你看行不行.
  ①你应该是像楼上说的没加for或其他循环语句;②且条件要一个个放,不然循环输出会出错,就不显示了;③下面是我多次修改的代码,让我们共同进步!:
  */
  
  var infor=[
  ["小A","女",21,"大一"],["小B","男",23,"大三"],
  ["小C","男",24,"大四"],["小D","女",21,"大一"],
  ["小E","女",22,"大四"],["小F","男",21,"大一"],
  ["小G","女",22,"大二"],["小H","女",20,"大三"],
  ["小I","女",20,"大一"],["小J","男",20,"大三"]
  ];
  
  document.write("<b>大一女生:</b><br/>");
  for(var i=0;i<10;i++){
  switch(infor[i][3]){
        case "大一":
               document.write("大一女生信息:"+infor[i]+"<br/>");
         break;
  
     }
  }
  
  document.write("<br/><b>女生姓名:</b><br/>");
  for(var i=0;i<10;i++){
  
  switch(infor[i][1]){
        case "女":
               document.write("大一女生信息:"+infor[i][0]+"<br/>");
         break;
     }
  }

  
  

  1 0

  EricZo...

  第二轮女生循环你并没有将上一循环得出的数据统计并再次筛选，所以你第二轮循环只是筛选的所有女生，而不是大一女生

  2017-03-06 16:14:59

  共 1 条回复 >

• 

  慕粉1440489053

  2017-02-28 00:04:58

  找到原因了 没有写FOR循环

  0 0