Question

I have the method below, which in my Blackjack app will get the value of the hand which is an NSMutableArray. The problem here is that when 2 Ace’s are in a hand, it should be a 12, but because it counts Ace’s as 11, it results in being 22, which then makes lowValue returned.

How can I make it so that I can check and see if the for loop has already found an Ace and if it finds another, makes the next Ace worth only 1, not 11?

Thanks!

int getHandValue(NSMutableArray *hand) {
    int lowValue = 0;
    int highValue = 0;

    for (KCCard *aCard in hand) {
            if (aCard.value == Ace) {
                lowValue+= 1;
                highValue+= 11;
            } else if (aCard.value == Jack || aCard.value == Queen || aCard.value == King) {
                lowValue += 10;
                highValue += 10;
            } else {
                lowValue += aCard.value;
                highValue += aCard.value;
            }
    }

    return (highValue > 21) ? lowValue : highValue;     
}

Answer 1

int getHandValue(NSMutableArray *hand) {
    int lowValue = 0;
    int highValue = 0;
    BOOL isFoundAce = NO;

for (KCCard *aCard in hand) {
        if (aCard.value == Ace) {
            if (isFoundAce) {
                 lowValue+= 1;
                 highValue+= 1;
            }
            else {
                 lowValue+= 1;
                 highValue+= 11;
                 isFoundAce= YES;
            }

        } else if (aCard.value == Jack || aCard.value == Queen || aCard.value == King) {
            lowValue += 10;
            highValue += 10;
        } else {
            lowValue += aCard.value;
            highValue += aCard.value;
        }
}

return (highValue > 21) ? lowValue : highValue;     
}