How to implement an avl tree in c++ with each node being another avl tree

Question

I Have an input.txt file which contains number like this: input.txt file

I am trying to make an avl tree in which every node is a number form the first column and each of these nodes point to another avl tree containing numbers from the second column.Could someone explain how to implement this in c++?

Answer 1

Implement this as you would with an integer node:

struct AVL_node
{
  bool color;
  int key;
  AVL_Tree value;
  AVL_Node * left_subtree;
  AVL_Node * right_subtree;
};

In a tree, you need to separate the key, value and link fields. The key is what you are using for ordering the nodes. The value is the data.

The value doesn't make a difference. It could be std::vector or std::map or missing. Nodes in general are not copied, only the links change. However, if a node is copied, both the key and value fields are copied.

Remembering, when organizing nodes, only the link fields change. The key is used to determine ordering.