void save_game(struct World *);
void record_action (char);
struct yx_uint16 mv_yx_in_dir (char, struct yx_uint16);
-char yx_uint16_cmp (struct yx_uint16, struct yx_uint16);
void next_turn (struct World *);
void update_log (struct World *, char *);
void move_player (struct World *, char);