用php做的计算器,大家看看.. - 站长论坛

<html>
      <head>
            <title></title>
            <meta content="text/html charset=gb2312">

      </head>
      <body>
            <?php
                     $no1=$_GET['no1'];
                     $no2=$_GET['no2'];
                     $no3=$_GET['no3'];

                     //global $num;
                     $a = $_GET['1'];
                     $a = $a.$_GET['2'];
                     $a = $a.$_GET['3'];
                     $a = $a.$_GET['4'];
                     $a = $a.$_GET['5'];
                     $a = $a.$_GET['6'];
                     $a = $a.$_GET['7'];
                     $a = $a.$_GET['8'];
                     $a = $a.$_GET['9'];

                     if((int)$a>0){
                              $num = $_GET['text'];
                              if($no1=="="){
                                    $num = 0;
                              }
                              $numa =(int)$num;
                              if($numa==0){
                                    $num = $a;
                              }else{
                                    $num = $num.$a;
                              }
                     }

                     if($_GET['CE']=="CE"){
                              $num = 0;
                              $no1 = 0;
                              $no2 = 0;
                              $no3 = 0;
                     }

                     //global $fuhao;
                     $fuhao = $_GET['jia'];
                     $fuhao = $fuhao.$_GET['jian'];
                     $fuhao = $fuhao.$_GET['cheng'];
                     $fuhao = $fuhao.$_GET['chu'];

                     //global $num2;
                     if($fuhao=='+'||$fuhao=='-'||$fuhao=='*'||$fuhao=='/'){
                              //global $fuhao1;
                              $no3 = $fuhao;
                              $no1 = $_GET['text'];
                              $num = 0;
                     }

                     //global $num3;

                     if($_GET['dengyu']=="="){
                              $num3 = $_GET['text'];
                              $no1 = (double)$_GET['no1'];
                              $no2 = (double)$num3;
                              $no3 = $_GET['no3'];
                              switch($no3){
                                    case '+':
                                             $num = $no1 + $no2;
                                             break;
                                    case '-':
                                             $num = $no1 - $no2;
                                             break;
                                    case '*':
                                             $num = $no1 * $no2;
                                             break;
                                    case '/':
                                             $num = $no1 / $no2;
                                             break;
                              }
                     }
            ?>
            <form name="" action="" method="get">
                     <table bgcolor="blue" border="10" align="center">
                              <tr align="center">
                                    <td colspan="4">计算器</td>
                              </tr>
                              <tr>
                                    <td colspan="4"><input type="text" name="text" readonly="true" align="right" value=<?php echo $num; ?> ></td>
                              </tr>
                              <tr>
                                    <td><input type="submit" name="1" value="1"></td>
                                    <td><input type="submit" name="2" value="2"></td>
                                    <td><input type="submit" name="3" value="3"></td>
                                    <td><input type="submit" name="jia" value="+"></td>
                              </tr>
                              <tr>
                                    <td><input type="submit" name="4" value="4"></td>
                                    <td><input type="submit" name="5" value="5"></td>
                                    <td><input type="submit" name="6" value="6"></td>
                                    <td><input type="submit" name="jian" value="-"></td>
                              </tr>
                              <tr>
                                    <td><input type="submit" name="7" value="7"></td>
                                    <td><input type="submit" name="8" value="8"></td>
                                    <td><input type="submit" name="9" value="9"></td>
                                    <td><input type="submit" name="cheng" value="*"></td>
                              </tr>
                              <tr>
                                    <td><input type="submit" name="CE" value="CE"></td>
                                    <td><input type="submit" name="0" value="0"></td>
                                    <td><input type="submit" name="dengyu" value="="></td>
                                    <td><input type="submit" name="chu" value="/"></td>
                              </tr>
                              <tr>
                                    <td><input type="hidden" name="no1" value=<?php echo $no1 ?> ></td>
                                    <td><input type="hidden" name="no2" value=<?php echo $no2 ?> ></td>
                                    <td><input type="hidden" name="no3" value=<?php echo $no3 ?> ></td>
                                    <td></td>
                              </tr>
                     </table>
            </form>
      </body>
</html>