/*** HEADER.H ***/

#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <time.h>
#include <string.h>

#define NROWS		8
#define NCOLS		640
#define	NSITES		(NROWS*NCOLS)


typedef struct siteinfo		/* SITE INFO STRUCTURE DEFINITION */
{
	int 	prey;
	int	indirect;		/* direction of incoming individuals */
	int	flag;			/* used for marking steps */
	struct siteinfo *nabes[4];	/* pointers to neighbors */
} Site;
Site	habitat[NROWS][NCOLS];


		/*** MAIN.C ***/
void ArgumentControl(int argc, char **argv);

		/*** GENERAL.C ***/
void InitSeed(void);
void Initialize_Arena(Site *arena);
void Initial_Conditions(Site arena[NROWS][NCOLS]);
void TwoBands(int *array, int *spot, int size);


		/*** IO.C ***/
void EPS_Header(FILE *fileid, int width, int length);
void EPS_Row(Site arena[NROWS][NCOLS], int rownum, int skip, FILE *fileid);
void EPS_Trailer(FILE *fileid);

		/*** MIGRATE.C ***/
void DiffusePrey(Site *arena, double leftbias);