#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))

void swap(int* a_left, int* a_right) {
    log_int(*a_left);
    log_int(*a_right);
    log_addr(a_left);
    log_addr(a_right);

    int old_left = *a_left;
    *a_left = *a_right;
    *a_right = old_left;

    log_int(*a_left);
    log_int(*a_right);
    log_addr(a_left);
    log_addr(a_right);
}

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

    log_int(num1);
    log_int(num2);
    swap(&num1, &num2);
    log_int(num1);
    log_int(num2);
    return EXIT_SUCCESS;
}
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