get method

Hi,

in a header file

I have a class called tree.h;

inside that class I have a struct

Code:

 	struct tree_node
        {
                tree_node* left;
                tree_node* right;
                int x;
                int y;
        }; 
        tree_node* root; 

inside the .cpp
file i want to make a method called getRoot()?

I have no idea how to do it