1 files changed, 2 insertions, 0 deletions
diff --git a/tree.h b/tree.h
index 8353a6d..8df9f53 100644
--- a/tree.h
+++ b/tree.h
@@ -1,5 +1,6 @@
 #ifndef TREE_H_HG
 #define TREE_H_HG
+#include <stdio.h>
 
 enum nodeType {
   BIOP,
@@ -20,6 +21,7 @@ typedef struct node {
 } node;
 
 node * parse(char *str);
+void fprintTree(FILE *stream, node *root, int level);
 void printTree(node *root, int level);
 
 #endif