add Bridge pattern

bridge/Bridge.cpp

@@ -10,8 +10,75 @@
 
 #include <iostream>
 
+/*
+ * Implementor
+ * defines the interface for implementation classes
+ */
+class Implementor {
+public:
+  virtual void action() = 0;
+  // ...
+};
+
+/*
+ * Concrete Implementors
+ * implement the Implementor interface and define concrete implementations
+ */
+class ConcreteImplementorA : public Implementor {
+public:
+  void action() {
+    std::cout << "Concrete Implementor A" << std::endl;
+  }
+  // ...
+};
+
+class ConcreteImplementorB : public Implementor {
+public:
+  void action() {
+    std::cout << "Concrete Implementor B" << std::endl;
+  }
+  // ...
+};
+
+/*
+ * Abstraction
+ * defines the abstraction's interface
+ */
+class Abstraction {
+public:
+  virtual void operation() = 0;
+  // ...
+};
+
+/*
+ * RefinedAbstraction
+ * extends the interface defined by Abstraction
+ */
+class RefinedAbstraction : public Abstraction {
+public:
+  RefinedAbstraction(Implementor *impl)
+    : implementor(impl) {}
+
+  void operation() {
+    implementor->action();
+  }
+  // ...
+  
+private:
+  Implementor *implementor;
+};
+
+
 int main()
 {
+  Implementor *ia = new ConcreteImplementorA;
+  Implementor *ib = new ConcreteImplementorB;
+
+  Abstraction *abstract1 = new RefinedAbstraction(ia);
+  abstract1->operation();
+
+  Abstraction *abstract2 = new RefinedAbstraction(ib);
+  abstract2->operation();
 
   return 0;
 }