u01: Add include guard to header

2023-04-22 09:59:12 +02:00 · 2023-04-22 09:59:12 +02:00 · cbee4361a1
parent 3e63e632b7
commit cbee4361a1
1 changed files with 3 additions and 0 deletions
--- a/u01/node.h
+++ b/u01/node.h
@ -1,3 +1,5 @@
+#ifndef _NODE_H
+#define _NODE_H
 #include <memory>
 #include <string>
 #include <vector>
@ -19,3 +21,4 @@ private:
 };

 node *create_complete_tree(std::size_t nr_child_nodes, unsigned int tree_depth);
+#endif