#include <stdio.h>
#include <stdlib.h>
#include <stdbool.h>
#include <assert.h>
#define print_int_expr_and_value(n)  printf("%s == %d\n", (#n), (n))
// WRONG swap(…)

void swap_wrong(int lhs, int rhs) {
    int lhs_orig = lhs;
    lhs = rhs;
    rhs = lhs_orig;
}

int main(int argc, char* argv[]) {
    int n1 =   3;
    int n2 = 100;
    print_int_expr_and_value(n1);
    print_int_expr_and_value(n2);

    swap_wrong(&n1, &n2);
    // PROBLEM:  Called swap_wrong with arguments of type int* but our swap_wrong takes int.
    printf("\nCalled swap_wrong(…)\n");

    print_int_expr_and_value(n1);
    print_int_expr_and_value(n2);
    printf("FAILURE:  Values were not actually swapped.\n");

    return EXIT_SUCCESS;
}
/*
b.c: In function ‘main’:
b.c:20:7: warning: passing argument 1 of ‘swap_wrong’ makes integer from ADDRESS without a cast [-Wint-conversion]
  swap_wrong(&n1, &n2);
       ^~~
b.c:8:15: note: expected ‘int’ but argument is of type ‘int *’
 void swap_wrong(int lhs, int rhs) {
           ~~~~^~~
b.c:20:12: warning: passing argument 2 of ‘swap_wrong’ makes integer from ADDRESS without a cast [-Wint-conversion]
  swap_wrong(&n1, &n2);
            ^~~
b.c:8:24: note: expected ‘int’ but argument is of type ‘int *’
 void swap_wrong(int lhs, int rhs) {
                    ~~~~^~~
*/ 
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