#include <stdio.h>
#include "initcells.h"
#include <ctype.h>

void getNumber(int *number);
void printNum(int cells [][MAXCELLS]);

int main()
{
  int number;
  int cells[2][MAXCELLS];
  getNumber(&number);
  initCells(cells,number);
  printNum(cells);


  return 0;
}

void getNumber(int *number)
{
  /*read number & check error*/

  char temp;
  int check;

  do
  {
    printf("Please enter non-zero seed value for the automata : ");

    check = scanf ("%d",number);
    if (check != 1)
    {
       do scanf ("%c", &temp);
       while (temp != '\n');

    }
  }
  while (check != 1 || *number == 0);


}

void printNum(int cells[][MAXCELLS])
{
        int a;
        int b;
        int count=1;
        char cas;
        for(a=0;a<MAXGEN;a++)
        {
           printf("\nGen%3d ",count);
           for(b=0;b<MAXCELLS;b++)
           {
                if(cells[a][b]==0)
                {
                     printf(" ");
                }
                else if(cells[a][b]==1)
                {
                     printf(".");
                }
                else if(cells[a][b]==2)
                {
                     printf("+");
                }
                else
                {
                     printf("#");
                }
                

           }

        count++;
        }
        printf("\n");
}

#define MAXCELLS 64
#define MAXGEN 20
#define NUMSTATE 4

void initCells(int cells[][MAXCELLS], int seed);

void initCells(int cells[][MAXCELLS], int seed)
{
   /* Randomly initialises each element in row 0 of
      the cells array with either the value 0 to
      NUMSTATE - 1

      To do this it needs a seed value which can be
      any non zero integer. This seed value is used
      in a pseudo random number generator. The
      particular generator used in this function is a
      Multiplicative Congruential Generator. Most
      random generators are of this type.

      The word pseudo is used to mean the random generator
      is not really random but just appears to be. All
      computer generated random generators have this
      property. Good generators just appear to be more
      random based upon a whole bunch of statistical
      tests.
   */

   int col;

   for (col=0; col<MAXCELLS; col++)
   {
      /* Spin the random number generator around */
      seed = (seed >> 15) + ((seed << 16) & 0x7ffffff1)
             - (seed >> 20) - ((seed << 11) & 0x7ffffff1);
      if (seed < 0) seed += 0x7ffffff1;

      /* Set cell col to 0 to NUMSTATE-1 using the random seed */
      cells[0][col] = seed % NUMSTATE;
   }
}