#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#include <string.h>

/*
   ∙ &▒ means address of ▒
   ∙ *▒ means value at ▒  (which should be an address)
   ∙ *▒ = ░  means store ░ at ▒  (▒ should be an address)
   ∙ When you declare a variable like this…
     ▒▒▒* ░ = …
     The type of the variable will be "address of a ▒▒▒".
   ∙ One way to print an address from your program is to use
     printf("%p", (void*) ▒);
   ∙ The (void*) typecasts ▒ to an address of anything.
*/

int main(int argc, char* argv[]) {
    int    n = 5;
    printf("int    n = 5;\n");

    int* a_n = &n;
    printf("int* a_n = &n;\n");
    printf(" a_n contains %p\n", (void*) a_n);
    printf("  &n is       %p\n", (void*) (&n));
    printf("*a_n is       %d\n", *a_n);

    printf("   n contains %d\n",  n);
    printf("\n");

    *a_n = 7;
    printf("*a_n = 7;\n");

    printf("*a_n contains %d\n", *a_n);
    printf("   n contains %d\n",  n);
    printf("\n");

    n = 9;
    printf("n = 9;\n");
    printf("*a_n contains %d\n", *a_n);
    printf("   n contains %d\n",  n);

    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */