首页 \ 问答 \ 我怎么能做我的类的对象数组（继承另一个自定义类）？(How can I do an array of object of my class (with inheritance of another custom class)? [closed])

我怎么能做我的类的对象数组（继承另一个自定义类）？(How can I do an array of object of my class (with inheritance of another custom class)? [closed])

 我必须做这个小程序的作业： 
 

 
 
 该计划必须管理玩具代理。 以下行是具体内容： 
 
 
     
  
  1.  玩具必须具有唯一的代码，名称，类别（可以具有此价值：汽车，娃娃装，电子玩具，机器人，购物车，桌游），价格; 
    2.  
  
  2.  批次必须有一个独特的代码，插入批次的玩具清单，现在可用的批次类型的数量，数据生成; 
    3.  
  
  3.  玩具必须存储在名为“toys.txt”的文本文件中，而批次必须存储在大小为10.000的数组中; 
    4.  
 
 

 

 我如何实现第[3]点的第二部分？ 
 

 我用这个字段实现了一个名为Toy的类： 
 

     
 
  •  int code 
    •  
 
  •  string name 
    •  
 
  •  enum category {car, ....} 
    •  
 
  •  double price 
    •  

 

 之后，我用这个字段实现了第二个名为Lot的类： 
 

     
 
  •  int code 
    •  
 
  •  int numberOfLotAvaiable 
    •  
 
  •  string data 
    •  
 
  •  Toy toys 
    •  

 

 “必须存储大小为10.000的数组”我是否必须在类Lot中添加一个带有数组的字段？ 或者我是否必须在Main方法中执行Lot类型的数组？ 甚至，我还要做其他课吗？ 
 

 感谢您提供各种帮助！ 

I have to do for homework this little program:
 

 
 
The program have to manage an agency of toys. The following line are the specifics:
 
 
     
  
  1. Toys must have a unique code, a name, a category (that can have this value: car, babydoll, electronic toy, robot, peluche, boardgame), price;
    2.  
  
  2. The lots must have a unique code, the list of toys which are inserted in the lot, the number of the lot-type now avalaible, data production;
    3.  
  
  3. Toys must be storaged in a text file called 'toys.txt', while lots must be storaged in an size-10.000 array;
    4.  
 
 

 

How can I implement the second part of point [3]? 
 

I have implement a class called Toy with this field:
 

     
 
  • int code
    •  
 
  • string name
    •  
 
  • enum category {car, ....}
    •  
 
  • double price
    •  

 

After that, I have implement a second class called Lot with this field:
 

     
 
  • int code
    •  
 
  • int numberOfLotAvaiable
    •  
 
  • string data
    •  
 
  • Toy toys
    •  

 

"lots must be storaged in an size-10.000 array" Do I have to add a field in class Lot with an array? Or Do I have to do an array of type Lot in the Main method ? Even, Do I have to do an other class?
 

Thank you in advantage for all kind of help!

原文：https://stackoverflow.com/questions/17504275
更新时间：2022-10-20 15:10

最满意答案

 这是一个PHP解决方案，其中下面的整个代码将在同一个文件中使用。 
 

 您现在的代码似乎缺少一些东西，例如<table></table>和<form></form>标签，以及提交按钮。 
 

 另外，（表单）选择需要“名称”属性; 你不能单靠一个“id”。 
 

<form action="" method="post">
<table border="1">
    <td><center>
            <select name="row7">
            <option value = "0" selected>0</option>
            <option value = "1" >1</option>
            <option value = "2" >2</option>
      </select>
    </td>
    <td><center>
         <select name="row8" class="Drops">
            <option value = "0" selected>0</option>
            <option value = "1">1</option>
            <option value = "2">2</option>
        </select>
       </td>
<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

// error_reporting(0);

if(isset($_POST['submit']) && isset($_POST['row7']) && isset($_POST['row8'])){

                $var7 = (int)$_POST['row7'];
                $var8 = (int)$_POST['row8'];

                $total2 = (int)$var7+$var8;
// echo $total2;
}
?>
     <td><center><textarea name='row12' cols='2' rows='1' readonly='true'>
     <?php if(!empty($total2)) { echo (int)$total2; } ?>
     </textarea></center></td>
    </table>

<input type="submit" name="submit" value="ADD">

</form>


Here is a PHP solution, where the entire code below is to used inside the same file.
 

Your present code seems to be missing a few things, such as <table></table> and <form></form> tags, as well as a submit button.
 

Plus, the (form) selects require a "name" attribute; you cannot rely on an "id" alone.
 

<form action="" method="post">
<table border="1">
    <td><center>
            <select name="row7">
            <option value = "0" selected>0</option>
            <option value = "1" >1</option>
            <option value = "2" >2</option>
      </select>
    </td>
    <td><center>
         <select name="row8" class="Drops">
            <option value = "0" selected>0</option>
            <option value = "1">1</option>
            <option value = "2">2</option>
        </select>
       </td>
<?php
error_reporting(E_ALL);
ini_set('display_errors', 1);

// error_reporting(0);

if(isset($_POST['submit']) && isset($_POST['row7']) && isset($_POST['row8'])){

                $var7 = (int)$_POST['row7'];
                $var8 = (int)$_POST['row8'];

                $total2 = (int)$var7+$var8;
// echo $total2;
}
?>
     <td><center><textarea name='row12' cols='2' rows='1' readonly='true'>
     <?php if(!empty($total2)) { echo (int)$total2; } ?>
     </textarea></center></td>
    </table>

<input type="submit" name="submit" value="ADD">

</form>

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