工作之余,写着玩的。
<?php $num1 = $_POST[‘num1‘]; $num2 = $_POST[‘num2‘]; $yusuan = $_POST[‘yusuan‘]; $jieguo = 0; switch($yusuan){ case ‘+‘: $jieguo = $num1 + $num2;break; case ‘-‘: $jieguo = $num1 - $num2;break; case ‘*‘: $jieguo = $num1 * $num2;break; case ‘/‘: $jieguo = $num1 / $num2;break; } ?> <form action="" method="post"> <table align="center" border="1"> <tr> <td><input type="text" name="num1" value="<?php echo $num1; ?>"/></td> <td> <select name="yusuan"> <option value="+" <?php if($yusuan=="+"){echo ‘selected="select"‘;} ?>">+</option> <option value="-" <?php if($yusuan=="-"){echo ‘selected="select"‘;} ?>">-</option> <option value="*" <?php if($yusuan=="*"){echo ‘selected="select"‘;} ?>">*</option> <option value="/" <?php if($yusuan=="/"){echo ‘selected="select"‘;} ?>">/</option> </select> </td> <td><input type="text" name="num2" value="<?php echo $num2; ?>"/></td> <td><input type="submit" value="="/></td> <td><input type="text" name="jieguo" value="<?php echo $jieguo;?>"/></td> </tr> </table> </form>
时间: 2024-10-05 02:46:22