Added facade example.

README.md

@@ -1380,7 +1380,86 @@ code, such as a class library.
 
 #### Programmatic Example
 
-TODO
+Taking our computer example from above. Here we have the computer class
+
+```cpp
+class Computer
+{
+  public:
+    typedef std::shared_ptr<Computer> ptr_t;
+
+    void makeBootSound(void)
+    {
+      std::cout << "Beep!" << std::endl;
+    }
+
+    void showLoadingScreen(void)
+    {
+      std::cout << "Loading..." << std::endl;
+    }
+
+    void showWelcomeScreen(void)
+    {
+      std::cout << "Ready to use!" << std::endl;
+    }
+
+    void closeEverything(void)
+    {
+      std::cout << "Closing all programs!" << std::endl;
+    }
+    void sleep(void)
+    {
+      std::cout << "Zzz" << std::endl;
+    }
+};
+```
+
+Here we have the facade
+
+```cpp
+class ComputerFacade
+{
+  public:
+    ComputerFacade(Computer::ptr_t computer)
+        : computer_(computer)
+    {
+    }
+
+    void turnOn(void)
+    {
+      computer_->makeBootSound();
+      computer_->showLoadingScreen();
+      computer_->showWelcomeScreen();
+    }
+
+    void turnOff(void)
+    {
+      computer_->closeEverything();
+      computer_->sleep();
+    }
+
+  private:
+    Computer::ptr_t computer_;
+};
+```
+
+Here is how this can be used:
+
+```cpp
+Computer::ptr_t computer = std::make_shared<Computer>();
+ComputerFacade facade(computer);
+
+// Output:
+// Beep!
+// Loading...
+// Ready to use!
+facade.turnOn();
+
+// Output:
+// Closing all programs!
+// Zzz
+facade.turnOff();
+```
 
 #### When To Use