Proxy Pattern was added.

Author: khajavi

Structural/Proxy/Classic/C++/Main.cpp

@@ -0,0 +1,35 @@
+#include <iostream>
+using namespace std;
+
+class Subject {
+public:
+	virtual void request() = 0;
+};
+
+class RealSubject : public Subject {
+public:
+	virtual void request() {
+		cout << "Request by RealSubject" << endl;
+	}
+};
+
+class Proxy : public Subject {
+public:
+	virtual void request() {
+		cout << "Request by Proxy" << endl;
+		if ( _realSubject == NULL ) {
+			_realSubject = new RealSubject();
+		}
+		_realSubject->request();
+	}
+private:
+	RealSubject* _realSubject;
+};
+
+int main() {
+	
+	Subject* proxy = new Proxy();
+	proxy->request();
+
+	return 0;
+}

Structural/Proxy/ImageProxy/C++/Main.cpp

@@ -0,0 +1,39 @@
+#include <iostream>
+using namespace std;
+
+class Graphic {
+public:
+	virtual void draw() = 0;
+};
+
+class Image : public Graphic {
+public:
+	Image() {
+		// load image frome disk.
+	}
+	virtual void draw() {
+		cout << "Draw real image." << endl;
+	}
+};
+
+class ProxyImage : public Graphic {
+public:
+	virtual void draw() {
+		if(_image == NULL) {
+			_image = new Image();
+			cout << "Real image is assigned." << endl;
+		}
+		_image->draw();
+	}
+private:
+	Image* _image;
+};
+
+int main() {
+
+	Graphic* proxyImage = new ProxyImage();
+	proxyImage->draw();
+	proxyImage->draw();
+	proxyImage->draw();
+	return 0;
+}