help with deep copying a binary tree?

hello i am trying to write a function that would make a deep copy of a binary tree.

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#ifndef Binary_Trees
#define Binary_Trees
# include <string>
#include <functional>
using namespace std;
struct treeNode
{
	std::string data;

	treeNode* left;
	treeNode* right;



};
class Tree
{
public:
	Tree();
	bool insertNode(string name, treeNode* &theRoot);
	bool deleteNode(string name,treeNode* &theRoot);
	void copyTree(treeNode* treeCopy,const treeNode * theRoot);
	void printTree(string name);
	void inOrderTraversal(const function<void(string)> &funcToCall, treeNode* theRoot);
	void postOrderTraversal(const function<void(string)> &funcToCall, treeNode* theRoot);
	void preOrderTraversal(const function<void(string)> &funcToCall, treeNode* theRoot);
	int returnRoot();
private:
	treeNode* current;

	treeNode* Trail;

	treeNode* traversal;

	treeNode* nodeToSwap; 
	treeNode* theRoot;
	treeNode* parentNodeToSwap;
	
};


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using namespace std;
void printTree(string name);
void main()


{
	Tree treeClass;
	treeNode* theRoott = NULL;
	treeNode* copyRoot = NULL;
	

	treeClass.insertNode("Jinx",theRoott); // inserts the names into the binary tree;
	treeClass.insertNode("Charmander",theRoott);
	treeClass.insertNode("Snorlax",theRoott);
	treeClass.insertNode("Clefairy",theRoott);
	treeClass.insertNode("Diglett",theRoott);
	treeClass.insertNode("Kakuna",theRoott);
	treeClass.insertNode("Meowth",theRoott);
	treeClass.insertNode("Nidorina",theRoott);
	treeClass.insertNode("Pikachu",theRoott);
	treeClass.insertNode("Blastoise",theRoott);
	treeClass.insertNode("Squirtle",theRoott);
	treeClass.insertNode("Ivysaur",theRoott);
	treeClass.insertNode("Bulbasaur",theRoott);
	treeClass.insertNode("Abra",theRoott);

	treeClass.copyTree(copyRoot, theRoott);

	

	treeClass.inOrderTraversal(printTree,copyRoot); // should print the copy tree


	cin.get();
	cin.ignore();
}


Tree::Tree(){

	string data = "";

	treeNode* left = NULL;
	treeNode* right=NULL;
	theRoot = NULL;
	current = NULL;

	Trail=NULL;

	traversal=NULL;

	nodeToSwap=NULL;

parentNodeToSwap=NULL;



}
bool Tree::insertNode(string name, treeNode* &theRoot)
{
	treeNode* newNode = NULL;
	treeNode* current = NULL;
	treeNode* previous = NULL;

	newNode = new treeNode;
	newNode->data = name;
	newNode->left = NULL;
	newNode->right = NULL;

	current = theRoot;

	if (current == NULL) // if the current or the root is NULL that means its empty
	{

		theRoot = newNode;
		return true;
	}
	else
	{
		while (current != NULL)
		{
			if (newNode->data < current->data) // we would go left
			{
				previous = current; // update our prev to equal current
				current = current->left;// would go left because its smaller then current
			}
			else if (newNode->data> current->data) // we would go right
			{
				previous = current;
				current = current->right;
			}
			else // the nodes are the same
			{
				return false;
			}


		}

		if (newNode->data < previous->data)
		{
			previous->left = newNode;
		}
		else
		{
			previous->right = newNode;

		}
		return true;

	}







}

void Tree::inOrderTraversal(const function<void(string)> &funcToCall, treeNode* theRoot)
{

	if (theRoot != NULL)
	{
		// call the traversal function on the left child
		inOrderTraversal(funcToCall,theRoot->left);
		// print the node
		//printTree(theRoot->data);
		std::cout << theRoot->data << endl;
		// call the traversal function on the right child
		inOrderTraversal(funcToCall,theRoot->right);
	}
}








void Tree::postOrderTraversal(const function<void(string)> &funcToCall, treeNode* theRoot)
{

	if (theRoot != NULL)
	{
		// call the traversal function on the left child
		postOrderTraversal(funcToCall,theRoot->left);
		// call the traversal function on the right child
		postOrderTraversal(funcToCall,theRoot->right);
		// print the node
		//std::cout << theRoot->data;
	}
}



void Tree::preOrderTraversal(const function<void(string)> &funcToCall, treeNode* theRoot)
{


	if (theRoot != NULL)
	{
		// print the node
		//cout << theRoot->data;
		// call the traversal function on the left child
		preOrderTraversal(funcToCall,theRoot->left);
		// call the traversal function on the right child
		preOrderTraversal(funcToCall,theRoot->right);
	}
}

void Tree::copyTree(treeNode* treeCopy,const  treeNode * theRoot)
{
	/*if (theRoot = NULL)
	{

		treeCopy = NULL;
	}
	else
	{*/

	while (theRoot != NULL)
	{
	

		treeCopy = new treeNode;
		treeCopy->data = theRoot->data;
		copyTree(treeCopy->left, theRoot->left);
		copyTree(treeCopy->right, theRoot->right);
	
	}
}



	void printTree(string name)
	{


		cout << name<<','<< endl;


	}

Last edited on
Are you trying to copy your tree to another tree? OR just deep copy your nodes or leafs?
yea trying to copy the tree to a empty tree
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