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

int X_DIM=16;
int Y_DIM=8;
int Z_DIM=4;

int main(void)
{
  char ***space;
  char ***Arr3D;
  int x, y, z;
  ptrdiff_t diff;

  /* first we set aside space for the array itself */

  space = malloc(X_DIM * Y_DIM * Z_DIM * sizeof(char));

  /* next we allocate space of an array of pointers, each
     to eventually point to the first element of a
     2 dimensional array of pointers to pointers */

  Arr3D = malloc(Z_DIM * sizeof(char **));

  /* and for each of these we assign a pointer to a newly
     allocated array of pointers to a row */

  for(z = 0; z < Z_DIM; z++)
  {
     Arr3D[z] = malloc(Y_DIM * sizeof(char *));

     /* and for each space in this array we put a pointer to
        the first element of each row in the array space
        originally allocated */

     for(y = 0; y < Y_DIM; y++)
     {
       Arr3D[z][y] = ((char *)space + (z*(X_DIM * Y_DIM) + y*X_DIM));
     }
  }

  /* And, now we check each address in our 3D array to see if
     the indexing of the Arr3d pointer leads through in a
     continuous manner */

  for(z = 0; z < Z_DIM; z++)
  {
    printf("Location of array %d is %p\n", z, *Arr3D[z]);
    for( y = 0; y < Y_DIM; y++)
    {
       printf("  Array %d and Row %d starts at %p", z, y, Arr3D[z][y]);
       diff = Arr3D[z][y] - (char *)space;
       printf("    diff = %d  ",diff);
       printf(" z = %d  y = %d\n", z, y);
    }
    getch();
  }
  return 0;
}
.