System.Array不包含添加的定义

Question

I am creating a blackjack game and so far I have made a card class, deck class and shoe class. The card class works the deck class works, the shoe class works but I am still working on my hand class. I created a method that throws an exception if there are already MAX_CARDS cards in the hand otherwise it adds the card to the hand and increments _cardCount but for some reason on my code _hand.Add(card) says that

System.Array does not contain a definition for Add.

Any help or guidance in the right direction would be appreciated

Here's what I have for my hand class

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

c＃中数组的大小是不可变的，因此我建议改用List。

private List<Card> _hand = new List<Card>(MAX_CARDS);

Answer 2

I think your code has a lot of problems, but if you really want to do it the way you're doing it, use the index to add an item:

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++;
    }
}

Answer 3

enter code here we create a new List with the elements in an array that already exists. We use the List constructor and pass it the array. List receives this parameter and fills its values from it.

Caution:The array element type must match the List element type or compilation will fail.

Program that copies array to List: C#

using System;
using System.Collections.Generic;

class Program
{

    static void Main()
    {

        int[] arr = new int[3]; // New array with 3 elements

        arr[0] = 2;


        arr[1] = 3;

        arr[2] = 5;

        List<int> list = new List<int>(arr); // Copy to List

        Console.WriteLine(list.Count);       // 3 elements in List

     }

}


Output : 3

Array is not good for your code in c# list is used array is not a good option. So use list type data. You can use list and store every type data in this object and convert it in any type and you can also get single data from list using a loop. It so easy to use it and implement so use list it good and easy for code .

First, we declare a List of int values. We create a new List of unspecified size and adds four prime numbers to it. Values are stored in the order added. There are other ways to create Lists—this is not the simplest.

using System.Collections.Generic;

class Program
{

  static void Main()

   {

     List<int> list = new List<int>();

     list.Add(2);

     list.Add(3);

     list.Add(5);

     list.Add(7);

   }

}