c# - System.Array不包含添加的定义

Question

我正在制作二十一点游戏，到目前为止，我已经完成了纸牌类，套牌类和鞋类。纸牌类(class)适用于甲板类(class)，鞋类适用，但我仍在手工类(class)中工作。我创建了一个方法，如果手中已经有MAX_CARDS张卡片，则会抛出异常；否则，它将添加该卡片到手中并递增_cardCount，但是出于某种原因，我的代码_hand.Add(card)说

System.Array does not contain a definition for Add.

任何在正确方向上的帮助或指导将不胜感激

这是我的手工课的内容

class Hand
{
    const Int32 MAX_CARDS = 12;

    private Card[] _hand = new Card[MAX_CARDS];
    private Int32 _cardCount = 0;

    public Int32 CardCount
    {
        get
        {
            return _cardCount;
        }
    }

    public void AddCard(Card card)
    {
        if (_cardCount >= MAX_CARDS)
        {
            throw new Exception("Cannot of more than 12 cards in a hand");
        }
        else
        {
            _hand.Add(card);
            _cardCount++;
        }
    }

    public Card GetCard(Int32 cardIndex)
    {
        if (cardIndex >= _cardCount)
        {
            throw new Exception("Invalid Entry");
        }
        else
        {
            return _hand[cardIndex];
        }
    }

    Int32[] cardValues = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 10, 10, 10 };
    String[] cardSymbols = { "A", "2", "3", "4", "5", "6", "7", "8", "9", "10", "J", "Q", "K" };

    private Int32 SymbolToValue(String symbol)
    {
        int index = Array.IndexOf(cardSymbols, symbol);
        if (index != -1)
        {
            return cardValues[index];
        }
        else
        {
            throw new Exception("Value Not In Table");
        }
    }

    public Int32 GetSum()
    {
        int value = 0;
        Boolean aceflag;
        for (int i = 0; i < _hand.Length; i++)
        {
            value += SymbolToValue(_hand[i].Value);
            if (String.Equals(_hand[i].Value, "A"))
            {
                aceflag = true;
            }
            else
            {
                aceflag = false;
            }
            if (aceflag == true && value <= 21)
            {
                value = value + 10;
            }
        }
        return value;
    }
}

Answer 1

我认为您的代码有很多问题，但是如果您确实想按照自己的方式进行操作，请使用索引添加一个项目:

public void AddCard(Card card)
{
    if (_cardCount >= MAX_CARDS)
    {
        throw new Exception(string.Format("This hand already contains {0} cards, " +
            "which is the maximum.", MAX_CARDS));
    }
    else
    {
        _hand[_cardCound] = card;
        _cardCount++;
    }
}