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

int main(int argc, char* argv[]) {

    int    n = 5;
    printf("n           == %d  // int\n",   n);

    int* a_n = &n;
    printf(" a_n == %p  // int*\n",  (void*) a_n);
    printf("*a_n == %d   (value at address a_n)\n", *a_n);

    int** a_a_n = &a_n;  // a_a_n is the address to and address to an int
    printf("  a_a_n     == %p  // int**\n", (void*)  a_a_n);
    printf(" *a_a_n     == %p  // int*\n",  (void*) *a_a_n);
    printf("**a_a_n     == %d  // int\n",          **a_a_n);

    int* a_some_int = *a_a_n;  // a_a_n was an int** so *a_a_n is an int*
    printf(" a_some_int == %p  // int*\n",  (void*) a_some_int);
    printf("*a_some_int == %d  // int\n",          *a_some_int);


    // a_a_n is an int** so **a_a_n is an int
    


    // Note:  Do not use type casts unless you have a *very* good reason.
    return EXIT_SUCCESS;
}
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