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c# - 平局后如何拿起第四张牌？

问题描述

我有这个纸牌战争游戏；游戏开始时，每个玩家翻转 1 张牌，拥有最高牌的人获胜。如果平局，接下来的三张牌面朝下打出，第四张牌面朝上，谁拥有最高的牌获胜。游戏一直进行到 1 名玩家拥有所有牌；但是，我无法正确完成它，每次我在“让翻转卡片”语句之后按回车时它都会崩溃，并且我无法让玩家获得第四张卡片，因为当使用第三个变量r3，它同样崩溃。

using System;
using System.Collections.Generic;

namespace PTCB12WARGAME2
{

    class Card
    {
        public string Name;
        public int Value;
        public string Suit;
        public override string ToString() { return string.Format("{0} of {1}", Name, Suit); }
    }
    class DeckOfCards
    {
        static void Main(string[] args)
        {

            List<Card> DeckOfCards = new List<Card>();
            var names = new[] { "Ace", "Two", "Three", "Four", "Five", "Six",
                     "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King" };

            var suits = new[] { "Hearts", "Clubs", "Diamonds", "Spades" };

            var cards = new List<Card>();

            // Populate our deck of cards with two nested loops
            foreach (var suit in suits)
            {
                // We use a 'for' loop here instead of 'foreach' so we can use the index to 
                // populate the Value (which is always one more than the index of the name)
                for (int i = 0; i < names.Length; i++)
                {
                    cards.Add(new Card { Name = names[i], Value = i + 1, Suit = suit });
                }
            }
            //Display deck of 52 cards

            Console.WriteLine("Each player is flipping over 1 card and whomever has the highest card wins");
            Console.ReadLine();



            for (int i = 0; i < DeckOfCards.Count; i++)
            {
                Console.WriteLine(DeckOfCards[i]);
            }

            Console.WriteLine();

            // create just ONCE the random object
            Random random = new Random();

            List<Card> deckOfPlayer1 = new List<Card>();
            List<Card> deckOfPlayer2 = new List<Card>();

            do
            {
                Console.WriteLine("Let's flip cards");
                string userAnswer = Console.ReadLine();
                if (userAnswer == "quit")
                    break;
                // pick a random card for player 1
                int r1;
                r1 = random.Next(0, DeckOfCards.Count);
                Card c1 = DeckOfCards[r1];
                deckOfPlayer1.Add(c1);
              

                // pick a random card for player 2
                int r2;
                r2 = random.Next(0, DeckOfCards.Count);
                Card c2 = DeckOfCards[r2];
                deckOfPlayer2.Add(c2);
               

                Console.WriteLine("Player1 has: {0}", c1);
                Console.WriteLine("Player2 has: {0}", c2);


                // now compare the cards

                if (c1.Value == c2.Value )
                {

                    Console.WriteLine("Its a tie! Next three cards in deck are played face down, " +
                        "4th card face up, whoever has the highest card wins");

                     int r3;
                    r3 = random.Next(0, DeckOfCards.Count);
                    Card c3 = DeckOfCards[3];
                    deckOfPlayer1.Add(c3);


                    Console.WriteLine(deckOfPlayer1[3]);
                    
                    Console.WriteLine(deckOfPlayer2[3]);

                   

                    if (c1.Value > c2.Value && c2.Value != 1)
                     {
                        deckOfPlayer1.Add(c2);
                        deckOfPlayer2.Remove(c2);
                        Console.WriteLine("Player1 wins");
                     
                    }
                    else
                    {
                        Console.WriteLine("Player2 wins");
                        deckOfPlayer2.Add(c1);
                        deckOfPlayer1.Remove(c1);
                    }

                }

                else if (c1.Value == 1 || (c1.Value > c2.Value && c2.Value != 1))
                {
                    deckOfPlayer1.Add(c2);
                    deckOfPlayer2.Remove(c2);
                    Console.WriteLine("Player1 wins");
                }
                else
                {
                    Console.WriteLine("Player2 wins");
                    deckOfPlayer2.Add(c1);
                    deckOfPlayer1.Remove(c1);
                }


            } while (deckOfPlayer1.Count < 52 || (deckOfPlayer2.Count < 52));

        }
    }
}

标签： c#

解决方案

首先，请学习如何使用交互式调试。如果您只知道“它崩溃了”，那么您将很难找到并消除代码中的错误。这是您可以开始的一个教程。

在这种情况下，问题可能是由于您使用了两个列表：

List<Card> DeckOfCards = new List<Card>();         // One here
var names = new[] { "Ace", "Two", "Three", "Four", "Five", "Six",
         "Seven", "Eight", "Nine", "Ten", "Jack", "Queen", "King" };

var suits = new[] { "Hearts", "Clubs", "Diamonds", "Spades" };

var cards = new List<Card>();                      // And one here

您正在用 填充第二个cards.Add，但您正在尝试在其他任何地方访问第一个，例如使用这些行：

r1 = random.Next(0, DeckOfCards.Count);
Card c1 = DeckOfCards[r1];

删除其中一个列表，用另一个实例替换它，您的代码将有更好的运行机会（免责声明：我没有编译它来检查其他问题）

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