Time for action – creating the interface

The interface, or header file, is just a text file with the .h extension.

1. Create a new text file and save it as HelloWorld.h. Then, enter the following lines at the top:

   #ifndef __HELLOWORLD_H__
   #define __HELLOWORLD_H__
   #include "cocos2d.h" 

2. Next, add the namespace declaration:

   using namespace cocos2d;

3. Then, declare your class name and the name of any inherited classes:

   class HelloWorld : public cocos2d::Layer {
   

4. Next, we add the properties and methods:

   protected:
   int _score;
   
   public:
   
       HelloWorld();
       virtual ~HelloWorld();
   
       virtual bool init();
       static cocos2d::Scene* scene();
       CREATE_FUNC(HelloWorld);
       void update(float dt);
       inline int addTwoIntegers (int one, int two) {
           return one + two;
       }
   };

5. We finish by closing the #ifndef statement:

   #endif // __HELLOWORLD_H__

What just happened?

You created a header file in C++. Let's go over the important bits of information:

• In C++ you include, you do not import...