#include <stdio.h>
#include <stdlib.h>

int main(void)
{
  int nrows = 5;     /* Both nrows and ncols could be evaluated */
  int ncols = 10;    /* or read in at run time */
  int row, col;
  int **rowptr;
  rowptr = malloc(nrows * sizeof(int *));
  if(rowptr == NULL)
  {
    puts("\nFailure to allocate room for row pointers.\n");
    exit(0);
  }
  printf("\n\n\nIndex   Pointer(hex)   Pointer(dec)   Diff.(dec)");

  for(row = 0; row < nrows; row++)
  {
    rowptr[row] = malloc(ncols * sizeof(int));
    if(rowptr[row] == NULL)
    {
      printf("\nFailure to allocate for row[%d]\n",row);
      exit(0);
    }
    printf("\n%d         %p         %d", row, rowptr[row], rowptr[row]);
    if(row > 0)
      printf("              %d",(int)(rowptr[row] - rowptr[row-1]));
  }
  return 0;
}
.