int save_dictionary_b(const struct dictionary_t *d, const char *filename)
{
    if(!d || !filename || !d->wc || d->capacity<=0 || d->size<0 || d->size>d->capacity)
        return 1;
    FILE *f=fopen(filename, "wb");
    if(!f)
        return 2;
    fwrite(&(d->size), sizeof(int), 1, f);
    int size=d->size;
    for(int i=0; i<size; i++)
    {
        int len=strlen((d->wc+i)->word);
        fwrite(&len, sizeof(int), 1, f);
        fwrite(&((d->wc+i)->word), sizeof(char), len, f);
        fwrite(&((d->wc+i)->counter), sizeof(int), 1, f);
    }
    fclose(f);
    return 0;
}