diff --git a/tree.c b/tree.c
new file mode 100644
index 0000000..9196ac8
--- /dev/null
+++ b/tree.c
@@ -0,0 +1,23 @@
+#include "trees.h"
+
+/*
+typedef struct node {
+	int val;
+	struct node* fils[];
+}Node, *PtNode, *Tree;
+ */
+
+void cons_tree(struct node **, int, struct node *)
+{
+  
+}
+
+void mk_empty_tree(struct node **);
+
+int is_leaf(struct node *);
+
+void add(struct node **, int);
+
+void load_tree(FILE *, struct node **);
+
+void free_tree(struct node **);
diff --git a/tree.h b/tree.h
new file mode 100644
index 0000000..3a8d162
--- /dev/null
+++ b/tree.h
@@ -0,0 +1,19 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+typedef struct node {
+	int val;
+	struct node* fils[];
+}Node, *PtNode, *Tree;
+
+void cons_tree(struct node **, int, struct node *);
+
+void mk_empty_tree(struct node **);
+
+int is_leaf(struct node *);
+
+void add(struct node **, int);
+
+void load_tree(FILE *, struct node **);
+
+void free_tree(struct node **);
--
libgit2 0.21.2