Thread: Help with a C program assignment. Please?

Ok I am currently working on an assignment that creates a 10x15 two-dimensional array for John Conway's "Game of Life". I need to get user input for the "occupied" slots in the array and then print the grid. I have this done. I then need to generate new generations of the the grid based on the specifications in the game. This requires two functions, one deciding the number of "neighbors" around a coordinate and one deciding the the new generation and putting it into a new array.

I am having problems with my

Code:

generate()

function. I know I need a temporary array to be able to write over my old array once I have my new generation. I am not sure how I can take the new generated array and be able to print it using my

Code:

printgrid()

function.

Here is my code so far. Any suggestions for my problem? I am very confused and lost on how to achieve thise.

Code:

#include <stdio.h>

#define SIZE 10
#define SIZE2 15
#define max(A,B) ( (A) > (B) ? (A):(B))
#define min(A,B) ( (A) < (B) ? (A):(B))

void initconfig(int [][SIZE2], int, int, int);
int occ(int [][SIZE2], int, int);
int* generate(int [][SIZE2], int, int);
void printgrid(int [][SIZE2], int, int );

int main ()
{

  int coordArray[SIZE][SIZE2] = {0}, x = 0, y = 0,
      generations = 0;

  initconfig(coordArray, x, y, generations);

  printf("\n\n\nInitial State\n\n");
  printgrid(coordArray, SIZE, SIZE2);

  printgrid(generate(coordArray, SIZE, SIZE2), SIZE, SIZE2);

  return 0;

}

void initconfig(int coordArray[][SIZE2], int x, int y, int generations)
{
   printf("\nEnter the number of generations: ");
   scanf("%d", &generations);

   printf("\nEnter coordinates: ");
   scanf("%d%d", &x, &y);

  while (x != -1){

    if(x<1 || x>10 || y<1 || y>15)
      printf("\nInvalid input.");
     else
      coordArray[x-1][y-1] = 1;

   printf("\nEnter coordinates: ");
   scanf("%d%d", &x, &y);
}
}

int* generate(int coordArray[][SIZE2], int row, int col)
{
  int tempArray[SIZE][SIZE2] = {0}, i=0, j=0;


  for(i=0; i <= row - 1; i++){
    for(j=0; j <= col - 1; j++){

      if(coordArray[i][j] == 1){
        if(occ(coordArray, i, j) == 2)
          tempArray[i][j] = 1;
        if(occ(coordArray, i, j) == 3)
          tempArray[i][j] = 1;
        else
          tempArray[i][j] = 0;}

      if(coordArray[i][j] == 0){
        if(occ(coordArray, i, j) == 3)
          tempArray[i][j] = 1;
        else
          tempArray[i][j] = 0;}
    }}

  for(i=0; i<= row - 1; i++){
    for(j=0; j <= col - 1; j++){
      coordArray[i][j] = tempArray[i][j];}}

  return coordArray;
}


int occ( int coordArray[][SIZE2], int x, int y )
{
  int neighbourCount = 0, i, j;
        for(i = max( 0, x - 1 ) ; i < min( SIZE2, x + 1 ); i++ )
        {
                for(j = max( 0, y - 1 ) ; j < min( SIZE, y + 1 ); j++ )
                {
                        if ( ( x == i ) & ( y == j ) )
                        {
                                continue;
                        }
                        if ( coordArray[ i ][ j ] == 1 )
                        {
                                neighbourCount++ ;
                        }
                }
        }
        return neighbourCount;
}

void printgrid(int coordArray[][SIZE2], int row, int col)
{
  int i, j;

  printf("\n");

  for(i=0; i <= row - 1; i++){
    for(j=0; j <= col - 1; j++){
      if(coordArray[i][j] == 1){
        printf("*");}
        else
          printf("-");}

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

I believe your code should look something like this...

Code:

void generate(int coordArray[][SIZE2], int row, int col)
{
  int tempArray[SIZE][SIZE2] = {0}, i=0, j=0;


  for(i=0; i < row ; i++){
    for(j=0; j < col; j++){

      if(coordArray[i][j] == 1){
        if(occ(coordArray, i, j) == 2)
          tempArray[i][j] = 1;
        if(occ(coordArray, i, j) == 3)
          tempArray[i][j] = 1;
        else
          tempArray[i][j] = 0;}

      if(coordArray[i][j] == 0){
        if(occ(coordArray, i, j) == 3)
          tempArray[i][j] = 1;
        else
          tempArray[i][j] = 0;}
    }}

  for(i=0; i< row; i++){
    for(j=0; j < col; j++){
      coordArray[i][j] = tempArray[i][j];}}

  //return coordArray;}


int main ()
{

  int coordArray[SIZE][SIZE2] = {0}, x = 0, y = 0,
      generations = 0;

  initconfig(coordArray, x, y, generations);

  printf("\n\n\nInitial State\n\n");
  printgrid(coordArray, SIZE, SIZE2);
generate(coordArray, SIZE, SIZE2);
 printgrid(coordArray, SIZE, SIZE2);

  return 0;

}