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

static void show_pointer(void *p, char *descr) {
    //    printf("Pointer for %s at %p\n", descr, p);
    printf("%s\t%p\t%lu\n", descr, p, (unsigned long) p);
}

int global = 0;

int useless() { return 0; }

int main ()
{
    void *p1, *p2, *p3, *p4;
    int local = 0;
    void *p = malloc(100);

    show_pointer((void *) &local, "local");
    show_pointer((void *) &global, "global");
    show_pointer((void *) p, "heap");
    show_pointer((void *) useless, "code");
    return 0;
}