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

// okay to copy/adapt these macros
#define log_int(n) printf("%s == %d\n", (#n), n)
#define log_addr(n) printf("%s == %p\n", (#n), (void*)n)

// broken: only swaps the values of the arguments of swap
//         not the original variables
void swap(int left, int right) {
    int left_orig = left;

    left = right;
    right = left_orig;
}

int main(int argc, char* argv[]) {
    int n1 = 5;
    int n2 = 27;

    log_int(n1);
    log_int(n2);

    swap(n1, n2);
    // swap((long)&n1, (long)&n2); // fixes warning, but not the bug
    /*
e_swap_bad_1.c: In function ‘main’:
e_swap_bad_1.c:24:7: warning: passing argument 1 of ‘swap’ makes integer from pointer without a cast [-Wint-conversion]
  swap(&n1, &n2);
       ^~~
e_swap_bad_1.c:10:15: note: expected ‘int’ but argument is of type ‘int *’
 void swap(int left, int right) {
           ~~~~^~~~
e_swap_bad_1.c:24:12: warning: passing argument 2 of ‘swap’ makes integer from pointer without a cast [-Wint-conversion]
  swap(&n1, &n2);
            ^~~
e_swap_bad_1.c:10:25: note: expected ‘int’ but argument is of type ‘int *’
 void swap(int left, int right) {
                     ~~~~^~~~~
     */
    printf("Swap called\n");
    log_int(n1);
    log_int(n2);

    return EXIT_SUCCESS;
}
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