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源自:4-10 编程练习

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4-10的编程题怎么做 求解

提问者:不将就70 2016-12-31 02:54

个回答

  • 空白185
    2017-01-06 22:55:24

    <!DOCTYPE  HTML>

    <html >

    <head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <title>流程控制语句</title>

    <script type="text/javascript">


     //第一步把之前的数据写成一个数组的形式,定义变量为 infos

     var infos=[

                ['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,'大二'],

                ['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']];

     //第一次筛选,找出都是大一的信息

     //第二次筛选,找出都是女生的信息

     for(var i=0;i<infos.length;i++)

      {

        if(infos[i][3]=='大一' && infos[i][1]=='女')

          {

                document.write(infos[i][0]+'<br>')

    }

    }

    </script>

    </head>

    <body>

    </body>

    </html>


  • 空白185
    2017-01-06 22:54:32

    <!DOCTYPE  HTML>

    <html >

    <head>

    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />

    <title>流程控制语句</title>

    <script type="text/javascript">


     //第一步把之前的数据写成一个数组的形式,定义变量为 infos

     var infos=[

                ['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,'大二'],

                ['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']];

     //第一次筛选,找出都是大一的信息

     //第二次筛选,找出都是女生的信息

     for(var i=0;i<infos.length;i++)

      {

        if(infos[i][3]=='大一' && infos[i][1])

          {

                document.write(infos[i][0]+'<br>')

    }

    }

    </script>

    </head>

    <body>

    </body>

    </html>

     


  • 慕前端8337980
    2016-12-31 08:00:38

    <!DOCTYPE  HTML>
    <html >
    <head>
    <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
    <title>流程控制语句</title>
    <script type="text/javascript">
    
     //第一步把之前的数据写成一个数组的形式,定义变量为 infos
     var infos=[["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"]];
    
     //第一次筛选,找出都是大一的信息
     var freshmen = new Array();
     var j = 0;
     for (var i = 0; i < infos.length; i ++){
        if (infos[i][3] == "大一"){
            freshmen[j++] = infos[i];
        }
     }
    //  document.write(freshmen.length);
     //第二次筛选,找出都是女生的信息
     for (var i = 0; i < j; i ++){
         if (freshmen[i][1] == '女'){
             document.write(freshmen[i][0] + "<br/>");
         }
     }
     
      
    </script>
    </head>
    <body>
    </body>
    </html>