MANY ARRAY ONE MALLOC. NO OTHER ARRAY DO THIS FOR YOU

main.c

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

extern void *alloc_nd_array(size_t, size_t, ...);

void structure_test(void) {
	int i;
	void **arr = alloc_nd_array(sizeof(void *), 3, 3, 2, 0);
	for(i=0; i<30; i++)
		printf("arr[%2d] = %18p, arr + %2d = %18p\n", i, arr[i], i, (void *)(arr + i));
	free(arr);
}

void usecase(void) {
	int i, j, k, l;
	int ****data = alloc_nd_array(sizeof(int), 2, 3, 4, 5, 0);
	for(i=0; i<2; i++)
		for(j=0; j<3; j++)
			for(k=0; k<4; k++)
				for(l=0; l<5; l++)
					data[i][j][k][l] = (i << 12)  + (j << 8) + (k << 4) + l;
	for(i=0; i<2; i++)
		for(j=0; j<3; j++) {
			for(k=0; k<4; k++)
				for(l=0; l<5; l++)
					printf("%04x ", data[i][j][k][l]);
			puts("");
		}
	free(data);
}

int main(void) {
	structure_test();
	usecase();
	exit(0);
}

multid.c

#include <stdarg.h>
#include <stdlib.h>
#include <string.h>

/* Takes a varargs list of dimensions for the array, ending in 0 */
void *alloc_nd_array(size_t size, size_t first, ...) {
	va_list	count;
	size_t	last, next, totalsize, arrsize;
	char	**block, **bptr;
	int	i, dims = 0;


	last = first;
	totalsize = 0;
	arrsize = 1;
	va_start(count, first);
	while ((next = va_arg(count, size_t))) {
		dims++;
		arrsize *= last;
		totalsize += arrsize;
		last = next;
	}
	va_end(count);

	block = bptr = malloc(totalsize * sizeof(void *) + arrsize * last * size);
	last = first;
	arrsize = 1;
	va_start(count, first);
	while ((next = va_arg(count, size_t))) {
		size_t offset = next * (--dims ? sizeof(void *) : size);
		arrsize *= last;
		*bptr = (char *)(bptr + arrsize);
		for (i = 1; i < arrsize; i++) {
			bptr[i] = bptr[i - 1] + offset;
		}
		bptr = (char **)(*bptr);
		last = next;
	}
	va_end(count);

	/* uncomment next line to zero alloc'd memory */
	/* memset(bptr, 0, size * last * arrsize); */

	return block;
}