#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 as an address to an int."
    // "… and initialize it to the address of n."

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

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

    *a_n = 7;
    // "Write 7 at address a_n."

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