void *threadTask (void * void_arg)
{
    character *ptr_task = ( character * ) void_arg;

    ptr_task->generate();
    ptr_task->sort_me();

    char *threadCompleted = new char[20];
    strcpy(threadCompleted, "Vlakna ukoncena.");

    pthread_exit( (void*) threadCompleted );
}

     char *exitCode;
     for(int i = 0; i < numberOfThreads; i++)
     {
        pthread_join( threads[i], (void**) &exitCode);
     }

    printf("\n%s\n", exitCode);