type.c

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

#define LEN(x) (sizeof(x) / sizeof(x[0]))

/*
 * Declare `arr`, an array of four pointers to arrays of two function pointers
 * to a function that accepts a pointer to a two by two two dimensional array
 * of ints as a parameter and returns an int.
 */
int (*((*arr[4])[2]))(int (*)[2][2]);

int foo(int (*p)[2][2])
{
	int i, j;

	for (i = 0; i < LEN(*p); i++) {
		for (j = 0; j < LEN((*p)[i]); j++) {
			(*p)[i][j] = 1337;
		}
	}
	return -1;
}

int main(void)
{
	int i, j, (*p)[2][2];

	for (i = 0; i < LEN(arr); i++) {
		arr[i] = malloc(sizeof(*arr[i]));
		for (j = 0; j < LEN(*arr[i]); j++) {
			(*arr[i])[j] = foo;
			p = malloc(sizeof(*p));
			((*arr[i])[j])(p);
			free(p);
		}
	}
	puts("No segfault!");
}