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

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

    int n1 = 5;
    printf("n1 == %d\n", n1);

    int* a_n1 = &n1;
    int n2 = *a_n1;  // n2 gets *a_n1
                     // *a_n1 means "value at a_n1"

    printf("n2 == %d\n", n2);

    *a_n1 = 7;  // Store 7 at (the address) a_n1.
    printf("n1 == %d\n", n1);

    printf("n2 == %d\n", n2);

    return EXIT_SUCCESS;
}
/*
n.c: In function ‘main’:
n.c:17:18: warning: format ‘%p’ expects argument of type ‘void *’, but argument 2 has type ‘int *’ [-Wformat=]
  printf("&n1 == %p\n", &n1);
                 ~^     ~~~
                 %ls
n1 == 5
&n1 == 0x7ffc1ba9d614
*/

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