12-binary_tree_leaves.c

#include "binary_trees.h"

/**
 * binary_tree_leaves - function that counts the leaves in a binary tree
 * @tree: pointer to the root node of the tree
 * Return: the number of leaves in a binary tree
 */

size_t binary_tree_leaves(const binary_tree_t *tree)
{
	size_t leaves = 0;

	if (!tree)
		return (0);

	if ((tree->left == NULL) && (tree->right == NULL))
		leaves++;

	leaves = leaves + binary_tree_leaves(tree->left);
	leaves = leaves + binary_tree_leaves(tree->right);

	return (leaves);
}