プログラム作成(call.php,Figure.class.php,Square.class.php,Triangle.class.php:継承の学習）

php/php10/day08_9/MyAuth.php

@@ -21,7 +21,7 @@ $param = array(
 $auth = new Auth("DB", $passwd, "MyLogin", TRUE);
 $Auth -> start();
 if ($auth -> getUsername() == "") {
-    //未承認→強制終了
+    //未承認→強制終了する
     exit(1);
 }
 ?>
\ No newline at end of file

php/php10/day10-1/call.php

@@ -12,7 +12,7 @@ function __autoload($name)
     require_once($name.".class.php");
 }
 
-// Triangleクラスのインスタンス化
+// Triangleクラス(Triangle.class.phpに有る)のインスタンス化
 $objCls = new Triangle();
 $objCls -> set_width(10);
 $objCls -> set_height(20);

php/php10/day10-2/Figure.class.php

+<?php
+abstract class Figure
+{
+    private $width;
+    private $height;
+    public function __construct(){
+        $this -> width = 1;
+        $this -> height = 1;
+    }
+    public function __destruct()
+    {
+        /*デストラクタ*/
+    }
+    public final function get_width()
+    {
+        return $this -> width;
+    }
+    public final function get_height()
+    {
+        return $this -> height;
+    }
+    public final function set_width()
+    {
+        if (is_numeric($width)) {
+            $this -> height = $height;
+        }
+    }
+    public final function set_height()
+    {
+        if (is_numeric($height)) {
+            $this -> height = $height;
+        }
+    }
+    //抽象メソッド
+    public abstract function get_area();
+}
+?>

php/php10/day10-2/Square.class.php

+<?php
+class Square extends Figure
+{
+    public function __construct()
+    {
+        parent::__construct();
+    }
+    public function get_area()
+    {
+        return $this -> get_width() * $this -> get_height();
+    }
+}
\ No newline at end of file

php/php10/day10-2/Triangle.class.php

+<?php
+class Triangle extends Figure
+{
+    public function __construct()
+    {
+        parent::__construct();
+    }
+    public function get_area()
+    {
+        return $this -> get_width() * $this -> get_height / 2;
+    }
+}

php/php10/day10-2/call.php

+<html>
+<head>
+<title>オブジェクト指向入門（ポリモーフィズム）</title>
+</head>
+<body>
+<h1 style = "background:#cccccc">オブジェクト入門（ポリモーフィズム</h1>
+<?php
+
+// autoload関数の定義
+function __autoload($name)
+{
+    require_once($name.".class.php");
+}
+
+// Triangleクラス(Triangle.class.phpに有る)のインスタンス化
+$objTri = new Triangle();
+$objTri -> set_width(10);
+$objTri -> set_height(20);
+print("三角形の面積:".$objTri -> get_area()."<br>");
+$objSqr = new Square();
+$objSqr -> set_width(10);
+$objSqr -> set_height(20);
+print("四角形の面積:".$objSqr -> get_area()."<br>");
+?>
+</body>
+</html>
\ No newline at end of file