added print function

C/GildedRose.h

@@ -1,3 +1,6 @@
+#ifndef ROSE_INCLUDED
+#define ROSE_INCLUDED
+
 typedef struct
 {
     char *name;
@@ -7,3 +10,6 @@ typedef struct
 
 extern Item* init_item(Item* item, const char *name, int sellIn, int quality);
 extern void update_quality(Item items[], int size);
+extern char* print_item(char* buffer, Item* item);
+
+#endif