第78讲面向对象编程综合练习

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>计算器</title>
 </head>
 <body>
    <form action="test078Result.php" method="post">
        <table width="300px" border="0">
            <td>第一个数</td> <td><input type="text" name="num1"/></td>
            <tr/>
            <td>第二个数</td> <td><input type="text" name="num2"/></td>
            <tr/>
            <td>运算符</td>
            <td>
            <select name="oper"/>
                <option value="+">+</option>
                <option value="-">-</option>
                <option value="*">*</option>
                <option value="/">/</option>
            </select>
            </td>
            <tr>
                <td colspan="2"><input type="submit" value="计算结果"/></td>
            </tr>
        </table>
    </form>
 </body>
</html>

<?php
    $num1=$_REQUEST['num1'];
    //2、接收num2
    $num2=$_REQUEST['num2'];
    //3、接收运算符
    $oper=$_REQUEST['oper'];

    class OperService{
        public $numOne;
        public $numTwo;
        public $operShow;
        public function setData($num1,$num2,$oper){
            $this->numOne = $num1;
            $this->numTwo = $num2;
            $this->operShow = $oper;
        }

        public function getLastShow(){
            $lastShow = 0;
            switch($this->operShow){
                case "+":
                    $lastShow = $this->numOne + $this->numTwo;
                    break;
                case "-":
                    $lastShow = $this->numOne - $this->numTwo;
                    break;
                case "*":
                    $lastShow = $this->numOne * $this->numTwo;
                    break;
                case "/":
                    $lastShow = $this->numOne / $this->numTwo;
                    break;
            }
            return $lastShow;
        }
    }


    $operService = new OperService();
    $operService->setData($num1,$num2,$oper);
    print $operService->getLastShow();
?>

结果：按要求输出。。。。

新版：
在html页面增加数据校验：

<!doctype html>
<html lang="en">
 <head>
  <meta charset="UTF-8">
  <meta name="Generator" content="EditPlus®">
  <meta name="Author" content="">
  <meta name="Keywords" content="">
  <meta name="Description" content="">
  <title>计算器</title>
  //增加js数据检验--有这个值不对的话浏览器就有弹窗了
    <script type="text/javascript">

        function check(){
            var num1 = document.getElementById("num1").value;
            var num2 = document.getElementById("num2").value;
            //window.alert(num1+" "+num2);
            if(isNaN(num1)||isNaN(num1)){
                window.alert("请确认输入的值是否整数");
                return false;
            }
        }

    </script>
 </head>
 <body>
    <form action="test078Result.php" method="post" onsubmit="return check()">
        <table width="300px" border="0">
            <td>第一个数</td> <td><input type="text" id="num1" name="num1"/></td>
            <tr/>
            <td>第二个数</td> <td><input type="text" id="num2" name="num2"/></td>
            <tr/>
            <td>运算符</td>
            <td>
            <select name="oper"/>
                <option value="+">+</option>
                <option value="-">-</option>
                <option value="*">*</option>
                <option value="/">/</option>
            </select>
            </td>
            <tr>
                <td colspan="2"><input type="submit" value="计算结果"/></td>
            </tr>
        </table>
    </form>
 </body>
</html>

结果处理界面增加数据接收判断：

<?php
    if(isset($_REQUEST['num1'])){
        $num1=$_REQUEST['num1'];
    }   
    if(isset($_REQUEST['num2'])){
        //2、接收num2
        $num2=$_REQUEST['num2'];
    }
    if(isset($_REQUEST['oper'])){
        //3、接收运算符
        $oper=$_REQUEST['oper'];
    }

    class OperService{
        public $numOne;
        public $numTwo;
        public $operShow;
        public function setData($num1,$num2,$oper){
            $this->numOne = $num1;
            $this->numTwo = $num2;
            $this->operShow = $oper;
        }

        public function getLastShow(){
            $lastShow = 0;
            switch($this->operShow){
                case "+":
                    $lastShow = $this->numOne + $this->numTwo;
                    break;
                case "-":
                    $lastShow = $this->numOne - $this->numTwo;
                    break;
                case "*":
                    $lastShow = $this->numOne * $this->numTwo;
                    break;
                case "/":
                    $lastShow = $this->numOne / $this->numTwo;
                    break;
            }
            return $lastShow;
        }
    }


    $operService = new OperService();
    $operService->setData($num1,$num2,$oper);
    print $operService->getLastShow();
?>

第78讲 面向对象编程综合练习

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第78讲面向对象编程综合练习