13-binary_tree_nodes.c

#include "binary_trees.h"

/**
 * binary_tree_nodes - counts the nodes with at least 1 child in a binary tree
 * @tree: tree
 * Return: 0 or 1
*/

size_t binary_tree_nodes(const binary_tree_t *tree)
{
	if (tree == NULL)
		return (0);

	if (tree->left != NULL || tree->right != NULL)
		return (1 + binary_tree_nodes(tree->left) + binary_tree_nodes(tree->right));

	return (0);

}