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

#define MAX 128
void *mp[MAX][MAX];
long min = ~0ul >> 1, max = ~0ul,avg = 0l,cnt = 0l;

int main(void)
{
	int i,j,k;
	union {
		long addr;
		void *ptr;
	} v;

	for (i = 0; i < MAX; ++i)
		for (j = 0; j < MAX; ++j)
			mp[i][j] = malloc(i);
	v.addr = 0;
	for (i = 0; i < MAX; ++i)
		for (j = 0; j < MAX; ++j) {
			v.ptr = mp[i][j];
			if (!v.ptr)
				continue;
			for (k = 1; !(k & v.addr); k <<= 1)
				;
			min = k < min ? k : min;
			max = k > max ? k : max;
			avg += k;
			cnt += 1;
			free(v.ptr);
		}
	printf("malloc() alignment (min/avg/max) = %ld/%.1f/%ld\n",min,avg/1.0/cnt,max);
	printf("malloc() returned a NULL pointer = %ld times\n",MAX*MAX-cnt);
	return 0;
}