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php基础编程作业-0805
Lank的博客
Original
508 people have browsed it

1.给定一个数组$arr = [23,3,45,6,78,8,34],筛选其偶数成员组成新的数组返回，请封装函数。

  1. <?php
  2. $arr = [23,3,45,6,78,8,34];
  3. function odd(array $arr):array
  4. {
  5.     $newArr=[];
  6.  for($i=0;$i<count($arr);$i++){
  7.     if($arr[$i]%2==0){
  8.         $newArr[]=$arr[$i];
  9. //或者使用array_push($newArr,$arr[$i]);
  10.     }
  11.  }
  12.  return $newArr;
  13. }
  14. var_dump(odd($arr));
  15. ?>

运行效果如下

2. 尝试实现简单的计算器功能，语言不限制。

  1. <!DOCTYPE html>
  2. <html lang="en">
  4. <head>
  5.     <meta charset="UTF-8">
  6.     <meta http-equiv="X-UA-Compatible" content="IE=edge">
  7.     <meta name="viewport" content="width=device-width, initial-scale=1.0">
  8.     <title>计算器</title>
  9. </head>
  11. <body>
  12.     <?php
  13.                     error_reporting(E_ALL &~E_NOTICE);
  14.                     if(isset($_POST['sub'])):
  15.                         if($_POST['opt']=='/'
  16.                         &&$_POST['num2']==0) $mess="
  17.                         <span style='color:red;'>除数不能为0</span>";
  18.                     endif;
  19.                     ?>
  20.     <h1>计算器</h1>
  21.     <table>
  22.         <form action="" method="POST">
  23.             <tr>
  24.                 <td>
  25.                     <input type="number" name="num1" required value="<?=$_POST['num1']?>">
  26.                 </td>
  27.                 <td>
  28.                     <select name="opt">
  29.                         <option value="+" <?=$_POST['opt']=="+"?"selected":"" ?>>+</option>
  30.                         <option value="-" <?=$_POST['opt']=="-"?"selected":"" ?>>-</option>
  31.                         <option value="*" <?=$_POST['opt']=="*"?"selected":"" ?>>*</option>
  32.                         <option value="/" <?=$_POST['opt']=="/"?"selected":"" ?>>/</option>
  33.                     </select>
  34.                 </td>
  35.                 <td>
  36.                     <input type="number" name="num2" required value="<?=$_POST['num2']?>">
  37.                 </td>
  38.                 <td>
  39.                     <input type="submit" name="sub" value="计算">
  43.                     <?php
  44.                  if(!$mess && isset($_POST['sub']) ):
  45.                       switch($_POST['opt']):
  46.                          case "+":
  47.                              $sum=(int)$_POST['num1']+(int)$_POST['num2'];break;
  48.                            case "-":
  49.                                $sum=(int)$_POST['num1']-(int)$_POST['num2'];break;
  50.                        case "*":
  51.                              $sum=(int)$_POST['num1']*(int)$_POST['num2'];break;
  52.                        case "/":
  53.                              $sum=(int)$_POST['num1']/(int)$_POST['num2'];break;
  55.                        endswitch;
  56.                        $res="计算结果:{$_POST['num1']}
  57.                        {$_POST['opt']}{$_POST['num2']}={$sum}";
  58.                        echo "<span style='color: green;'>{$res}</span>";
  59.                     else:
  60.                         echo $mess;
  61.                     endif;
  62.         ?>
  63.                 </td>
  64.             </tr>
  65.         </form>
  66.     </table>
  67. </body>
  69. </html>

运行效果如下：

Correcting teacher：天蓬老师天蓬老师

Correction status：qualified

Teacher's comments：
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