//watki
        for (int k = 0; k < i; k++)
        {
                tab[k][j] = k;
                if (thr_create(NULL, 0, suma, tab[k], 0, NULL) == 0)
                        cout << "Utworzono watek " << endl;
                else
                        cout << "Nie udalo sie utworzyc watku" << endl;
        }

        while (thr_join(0, NULL, NULL) == 0);

        double srednia = sum / i;
        cout << "Srednia: " << srednia << endl;
}

void * suma(void *arg)
{
        int suma = 0;
        int *p = (int*)arg;

                for (int w = 0; w<j; w++){
                        suma += p[w];
                }

        cout << "Wynik dla wiersza " << p[j] + 1 << endl;
        cout << suma << endl;
        sum += suma;
}