.cpp

int countNodes(){
		int count = 0;
		return getNodeCount(root, count);
	}

int BinTree::getNodeCount(TreeNode *nodePtr, int nodeCount) {
	//int nodeCount = 0;
	if (nodePtr) {
		nodeCount++;
		getNodeCount(nodePtr->left, nodeCount);
		getNodeCount(nodePtr->right, nodeCount);
		return nodeCount;
	}
	return 0;
}