added global board

src/main/c/GameTic_Tac_Toe/game.c

@@ -0,0 +1,6 @@
+#include <stdio.h>
+
+char board[3][3] = {{'1', '2', '3'},
+                    {'4', '5', '6'},
+                    {'7', '8', '9'}};
+char currentPlayer = 'X';