Hi 

we know, when we run a game we create a scene object and an object of the class added as child to that scene object like this-

Scene * HelloWorld::createScene()

{

auto scene = Scene::create();

auto layer = HelloWorld:;create();

scene->addChild(layer);

return scene;

}

Now, firstly the object of HelloWorld class is added as a child to the scene object.

Say, If I have 3 sprite objects created inside init() of HelloWorld and these need are added as child to the object of HelloWorld

My Question – 
1. If I am not specifying any zOrder while adding them as child, how will be they added ? (A graphical answered is greatly appreciated)
2. How the in-order traversal of nodes are working in cocos2d-x works.

3, Is that tree to which the nodes are added as child is a binary tree.. ?? (Surely not, as each node can have a number of children, show how they are added)

Answer is greatly appreciated if they could be given in drawings.