I made variables explicitily const.
#define BOX '$'
#define WALL '#'
#define MAN '@'
#define PLATFORM '.'
#define BOXINPLATFORM '*'
#define MANINPLATFORM 'E'
#define BLANK ' '
#define CORNER '-'
#define MANCANMOVE '+'
/* #define DEBUG */
enum
{
ALARM_SECONDS=1,
MAX_X=50,
MAX_Y=50,
MAX_MOVES=50,
MAX_STEPS=50,
MAX_BOXES=15
};
enum logic
{
TRUE=1,
FALSE=0
};
struct Position
{
int x;
int y;
};
struct Map
{
char Cells[MAX_Y][MAX_X];
char cells_boxes[MAX_Y][MAX_X];
char man_moves[MAX_Y][MAX_X];
int SizeX, SizeY;
struct Position Man;
int NumPlatforms;
int NumBoxesInPlatform;
struct Position Box[MAX_BOXES];
int NumBoxes;
};
enum e_direction
{
DIR_LEFT,
DIR_RIGHT,
DIR_DOWN,
DIR_UP
};
static const struct Position move_vectors[4] = {
{0, 1},
{0, -1},
{1, 0},
{-1, 0}};
struct BoxMove
{
int box;
struct Position dir;
};
/* Prototypes for map managing
* map.c */
void CopyMap (struct Map *Mdest, const struct Map *Morig);
int is_new_map(const struct Map maps[], const int depth);
/* Prototypes for unix i/o, processes
* os.c */
void ReadMap(struct Map *M, char *FileName);
void ShowMap (const struct Map *M);
void init_os();
void PrintMove(struct BoxMove b);
/* Functions related to map solution
* algorithm.c */
int solve_map(const struct Map origin);