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

int main(int argc, char* argv[]) {
    int n = 5;  // Set n to 5.
    printf("n == %d\n", n);
    
    printf("&n == %p\n", (void*)&n);
    // Print the "address of n."

    int* a_n = &n;
    // Declare a_n as the address of an int (aka int*).
    // Set a_n to the address of n (aka &n).
    printf("a_n == %p\n", (void*)a_n);
    
    printf("*a_n == %d\n", *a_n);
    // Print the "value at address a_n."

    printf("\n// *a_n = 7;");
    *a_n = 7;
    // Store 7 at address a_n.
    
    printf("n == %d\n", n);
    printf("*a_n == %d\n", *a_n);
    // Print the "value at address a_n."
    
    return EXIT_SUCCESS;
}
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