Deck of Cards 数组，用函数操作，打印出错误

Question

基本上，我的朋友让我帮助他的c#期中考试。我同意。他向我发送了所有问题，我们解决了除最后一个之外的所有问题。我们一直得到 80/100 分，但不知道哪里出了问题。这不像 leetcode 那样，他们给出最后执行的输入，这样我们就可以用它来调试问题。只是“答案不正确”错误。

这就是我首先用Python编码的方式

deck = input().split(', ')
n = int(input())


def add(deck,command):
    cardname = command[1]
    if cardname in deck:
        return 'Card is already in the deck'
    deck.append(cardname)
    return 'Card successfully added'


def remove(deck,command):
    cardname = command[1]
    if cardname in deck:
        deck.remove(cardname)
        return 'Card successfully removed'
    return 'Card not found'


def removeat(deck,command):
    index = int(command[1])
    if index not in range(len(deck)):
        return 'Index out of range'
    deck.pop(index)
    return 'Card successfully removed'


def insert(deck,command):
    index = int(command[1])
    cardname = command[2]
    if index not in range(len(deck)):
        return 'Index out of range'
    if cardname in deck and index in range(len(deck)):
        return 'Card is already in the deck'
    deck.insert(index,cardname)
    return 'Card successfully added'


for i in range(n):
    command = input().split(', ')
    if command[0]== 'Add' and len(command) ==2:
        print(add(deck,command))
    elif command[0]== 'Remove' and len(command) ==2:
        print(remove(deck,command))
    elif command[0]== 'Remove At'and len(command) ==2:
        print(removeat(deck,command))
    elif command[0]== 'Insert'and len(command) ==3:
        print(insert(deck,command))

print(', '.join(deck))

然后我使用 chatGPT 将其翻译为 c#，因为我不懂这种语言

using System;
using System.Collections.Generic;

class Program
{
    static void Main()
    {
        List<string> deck = new List<string>(Console.ReadLine().Split(", "));
        int n = int.Parse(Console.ReadLine());

        for (int i = 0; i < n; i++)
        {
            string[] command = Console.ReadLine().Split(", ");
            if (command.Length == 2 && command[0] == "Add")
            {
                Console.WriteLine(Add(deck, command));
            }
            else if (command.Length == 2 && command[0] == "Remove")
            {
                Console.WriteLine(Remove(deck, command));
            }
            else if (command.Length == 2 && command[0] == "Remove At")
            {
                Console.WriteLine(RemoveAt(deck, command));
            }
            else if (command.Length == 3 && command[0] == "Insert")
            {
                Console.WriteLine(Insert(deck, command));
            }
        }

        Console.WriteLine(string.Join(", ", deck));
    }

    static string Add(List<string> deck, string[] command)
    {
        string cardName = command[1];

        if (deck.Contains(cardName))
        {
            return "Card is already in the deck";
        }

        deck.Add(cardName);
        return "Card successfully added";
    }

    static string Remove(List<string> deck, string[] command)
    {
        string cardName = command[1];

        if (deck.Contains(cardName))
        {
            deck.Remove(cardName);
            return "Card successfully removed";
        }

        return "Card not found";
    }

    static string RemoveAt(List<string> deck, string[] command)
    {
        int index = int.Parse(command[1]);

        if (index >= 0 && index < deck.Count)
        {
            deck.RemoveAt(index);
            return "Card successfully removed";
        }

        return "Index out of range";
    }

    static string Insert(List<string> deck, string[] command)
    {
        int index = int.Parse(command[1]);
        string cardName = command[2];

        if (index >= 0 && index <= deck.Count)
        {
            if (deck.Contains(cardName) && index >= 0 && index < deck.Count)
            {
                return "Card is already in the deck";
            }

            deck.Insert(index, cardName);
            return "Card successfully added";
        }

        return "Index out of range";
    }
}

Answer 1

if (deck.Contains(cardName) && index >= 0 && index < deck.Count)

- 这看起来很可疑，因为上面的子句使用了

<=

并且你不需要再次检查它。

输入以下内容：

Ace of Diamonds
1
Insert, 1, Ace of Diamonds

它将输出：

Card successfully added
Ace of Diamonds, Ace of Diamonds

这是不正确的。我相信

insert at

操作中的索引检查应该是

index >= 0 && index < deck.Count

。所以完整的方法：

static string Insert(List<string> deck, string[] command)
    {
        int index = int.Parse(command[1]);
        string cardName = command[2];

        if (index >= 0 && index < deck.Count)
        {
            if (deck.Contains(cardName))
            {
                return "Card is already in the deck";
            }

            deck.Insert(index, cardName);
            return "Card successfully added";
        }

        return "Index out of range";
    }
}