#include <stdio.h>

#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;
}