random shuffle of array

shuffle

inline void shuffle(int* card, int cardsn)
{
    for(int n = 0; n < cardsn; n++)
    {
        int adj = cardsn - n;
        int m = (rand() % adj) + n;
        int tmp = card[n];
        card[n] = card[m];
        card[m] = tmp;
    }
}