bool pierwsza(unsigned n, unsigned* dzielnik, unsigned* nastepna)
{
    bool flaga = true;
    for (unsigned i = 2; i <= pow(n, 0.5); ++i)
    {
        if (n % i == 0)
        {
            *dzielnik = i;
            flaga = false;
            break;
        }
    }
    if (flaga)
    {
        *dzielnik = 0;
        *nastepna = n;
        return true;
    }

    unsigned a;
    unsigned* pointer = &a;
    for (unsigned i = n + 1; true; ++i)
    {
        if (pierwsza(i, pointer, nastepna))
            return false;
    }
}