Dynamic allocation of a 2D array | 2D Array Allocation Dynamically | Multi Dimension Array Dynamic Allocation

Dynamic allocation of a 2D array | 2D Array Allocation Dynamically | Multi Dimension Array Dynamic Allocation

main (void)
{
 int nrows, ncols, i, j;
 int **numbers; /* pointer to the first cell ([0][0]) */
 
 printf ("How many rows and columns?> ");
 scanf ("%d%d", &nrows, &ncols);

 /* allocating the array of pointers */
 numbers = (int **) calloc (nrows, sizeof(int *));

 /* allocating the array of integers */
 for (i=0; i<nrows; ++i)
  numbers[i] = (int *) calloc (ncols, sizeof(int));

 i=1; j=1;
 numbers[i][j] = 9; /* initializes one value to 9 */
 
 
 for (i=0; i<nrows; i=i+1)
 { 
  for (j=0; j<ncols; j=j+1)
  {
   printf ("%3d ", numbers[i][j]);
   
  }
  printf ("\n");
 }

 /* freeing the array */
 for (i=0; i<nrows; ++i)
  free (numbers[i]);

 free (numbers);

 return (0);
}