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

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

    int* a_n = &n;
    // Declare:  a_n is an address of an int.
    // Initialize:  Set a_n to the address of n.
    
    printf("n ==== %d\n", n);
    printf("a_n == %p\n", (void*)a_n);

    *a_n = 7;
    // Store 7 at address a_n.

    printf("n ==== %d\n", n);
    printf("a_n == %p\n", (void*)a_n);
    
    return EXIT_SUCCESS;
}
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