Free memory for binary tree in postorder

1 files changed, 5 insertions, 1 deletions

diff --git a/src/02/01/binary_tree.c b/src/02/01/binary_tree.c
index 7fd9763..00abae5 100644
--- a/src/02/01/binary_tree.c
+++ b/src/02/01/binary_tree.c
@@ -27,6 +27,10 @@ void postorder_traversal(Node *node, Visitor visitor) {
   visitor(node);
 }
 
+static void destructor(Node *node) {
+  free(node);
+}
+
 void destroy(Node *head) {
-  free(head);
+  postorder_traversal(head, destructor);
 }