#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))
// swap_wrong_1(…) - WRONG

void swap_wrong_1(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_1(n1, n2);
    printf("Called swap_wrong_1(n1, n2)\n");

    print_int_expr_and_value(n1);
    print_int_expr_and_value(n2);
    printf("PROBLEM:  n1 and n2 (in the stack frame of main(…))were not affected by swap(…).")

    return EXIT_SUCCESS;
}
/*
o.c: In function ‘main’:
o.c:20:15: warning: passing argument 1 of ‘swap_wrong_1’ makes integer from ADDRESS without a cast [-Wint-conversion]
  swap_wrong_1(&n1, &n2);
               ^~~
o.c:8:23: note: expected ‘int’ but argument is of type ‘int *’
 void swap_wrong_1(int lhs, int rhs) {
                   ~~~~^~~
o.c:20:20: warning: passing argument 2 of ‘swap_wrong_1’ makes integer from ADDRESS without a cast [-Wint-conversion]
  swap_wrong_1(&n1, &n2);
                    ^~~
o.c:8:32: note: expected ‘int’ but argument is of type ‘int *’
 void swap_wrong_1(int lhs, int rhs) {
                            ~~~~^~~
 */ 
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