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

int main(int argc, char* argv[]) {
    int n = 5;
    printf("//    n == %d\n", n);
    // printf("// &n == %p\n", &n);  // OOPS!!!
    printf("//   &n == %p\n", (void*) &n);
    printf("//   &n == %lu\n", (unsigned long int) &n);

    // ∙ &▒ is the address of ▒.  Memory address are numbers.  We usually represent in hexadecimal.
    
    int* a_n = &n;
    // ∙ int* (a type) is the address of an int.
    // ∙ In ECE 264, when dealing with addresses, name variable a_▒.
    //   BAD:   int* m = &n;
    printf("//  a_n == %p\n", (void*) a_n);
    printf("// *a_n == %d\n", *a_n);
    printf("\n");

    *a_n = 7;
    printf("*a_n = 7;\n");
    printf("//  a_n == %p\n", (void*) a_n);
    printf("// *a_n == %d\n", *a_n);
    printf("//    n == %d\n", n);
    
    return EXIT_SUCCESS;
}
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