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

#define log_int(n) printf("%s == %d\n", #n, (n))
#define log_addr(n) printf("%s == %p\n", #n, (void*)(n))

// wrong, swapping nested addresses is not useful here
void swap(int** a_a_left, int** a_a_right) {
    log_addr(*a_a_left);
    log_addr(*a_a_right);
    log_addr(a_a_left);
    log_addr(a_a_right);

    int* old_a_left = *a_a_left;
    *a_a_left = *a_a_right;
    *a_a_right = old_a_left;

    log_addr(*a_a_left);
    log_addr(*a_a_right);
    log_addr(a_a_left);
    log_addr(a_a_right);
}

int main(int argc, char* argv[]) {
    int num1 = 10;
    int num2 = 5;

    log_int(num1);
    log_int(num2);
    int* a_num1 = &num1;
    int* a_num2 = &num2;
    log_addr(a_num1);
    log_addr(a_num2);
    swap(&a_num1, &a_num2);
    log_int(num1);
    log_int(num2);
    log_int(*a_num1);
    log_int(*a_num2);
    log_addr(a_num1);
    log_addr(a_num2);
    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */