Add sprite to your scene(.h)

HelloWorldScene.h

class HelloWorld : public cocos2d::CCLayer
{
private:
	CCSprite *charlie;

	float totalTime;
public:
    // Here's a difference. Method 'init' in cocos2d-x returns bool, instead of returning 'id' in cocos2d-iphone
    virtual bool init();  

    // there's no 'id' in cpp, so we recommand to return the exactly class pointer
    static cocos2d::CCScene* scene();

    // a selector callback
    void menuCloseCallback(CCObject* pSender);

    // implement the "static node()" method manually
    LAYER_CREATE_FUNC(HelloWorld);
};