X-Git-Url: http://git.scottworley.com/slidingtile/blobdiff_plain/e86755d75f4040ae6619702a6501325ea81b03e1..8e6828002385c8eb62f663700295549e54189704:/sliding_tile_lib.h?ds=inline

diff --git a/sliding_tile_lib.h b/sliding_tile_lib.h
index 7b16a51..7e6004b 100644
--- a/sliding_tile_lib.h
+++ b/sliding_tile_lib.h
@@ -1,20 +1,8 @@
+#ifndef _SLIDING_TILE_LIB_H
+#define _SLIDING_TILE_LIB_H
+
 const int BOARD_DIM = 4;
 const int BOARD_SIZE = BOARD_DIM * BOARD_DIM;
-signed char adjacent[BOARD_SIZE][5] = {
-  1,   4,   -1,  -1,  -1,
-  0,   2,   5,   -1,  -1,
-  1,   3,   6,   -1,  -1,
-  2,   7,   -1,  -1,  -1,
-  0,   5,   8,   -1,  -1,
-  1,   4,   6,   9,   -1,
-  2,   5,   7,   10,  -1,
-  3,   6,   11,  -1,  -1,
-  4,   9,   12,  -1,  -1,
-  5,   8,   10,  13,  -1,
-  6,   9,   11,  14,  -1,
-  7,   10,  15,  -1,  -1,
-  8,   13,  -1,  -1,  -1,
-  9,   12,  14,  -1,  -1,
-  10,  13,  15,  -1,  -1,
-  11,  14,  -1,  -1,  -1,
-};
+extern signed char adjacent[BOARD_SIZE][5];
+
+#endif /* _SLIDING_TILE_LIB_H */