refactor - removed some magic numbers

include/card.h

@@ -10,6 +10,7 @@
 #define DIAMONDS 1
 #define CLUBS 2
 #define SPADES 3
+#define NUM_SUITS 4
 
 // Card ranks
 #define TWO 0
@@ -25,6 +26,8 @@
 #define QUEEN 10
 #define KING 11
 #define ACE 12
+#define NUM_RANKS 13
+#define RANK_OFFSET 2 // Because the first rank is 2 and ranks start at 0
 
 // Card types
 typedef struct

include/game.h

@@ -5,6 +5,11 @@
 #define MAX_DECK_SIZE 52
 #define MAX_SELECTION_SIZE 5
 
+// TODO: Turn into enum?
+#define BG_ID_CARD_SELECTING 1
+#define BG_ID_CARD_PLAYING 2
+#define BG_ID_ROUND_END 3
+
 enum GameState
 {
     GAME_PLAYING,