-bool is_legal_shot(int y, int x, unsigned int current_player, unsigned int pawn_array[board_size][board_size]);
-unsigned int valid_shot(int y, int x, unsigned int current_player, unsigned int pawn_array[board_size][board_size]);
+bool is_legal_shot(unsigned int y, unsigned int x, unsigned int current_player, unsigned int pawn_array[board_size][board_size]);
+unsigned int valid_shot(unsigned int y, unsigned int x, unsigned int current_player, unsigned int pawn_array[board_size][board_size]);