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

// ⚠ Do not use variables called "thing".  This is only for effect.

int compare_fn(const void* a_s1, const void* a_s2) {
    const char* s1 = *((char**)a_s1);
    const char* s2 = *((char**)a_s2);
    return strlen(s1) - strlen(s2);
}

void print_array_of_strings(char** strings, size_t num_strings) {
    printf("num_strings == %zd\n", num_strings);
    for(int i = 0; i < num_strings; i++) {
        printf("strings[%d] == \"%s\"\n", i, strings[i]);
    }
}

int main(int argc, char* argv[]) {
    char* strings[] = { "When", "implemented", "well,", "it", "can" };
    size_t num_strings = sizeof(strings) / sizeof(*strings);

    print_array_of_strings(strings, num_strings);

    qsort(&strings[0], num_strings, sizeof(strings[0]), compare_fn);

    print_array_of_strings(strings, num_strings);

    /* void qsort(void *base, size_t nmemb, size_t size,
     *            int (*compar)(const void *, const void *));
     */
    
    return EXIT_SUCCESS;
}
/* vim: set tabstop=4 shiftwidth=4 fileencoding=utf-8 noexpandtab: */