C# 使用用户输入来选择从哪个字符串数组中随机打印元素

Question

我是编码新手，所以请原谅我的术语..

我正在尝试制作一个随机的英雄联盟皮肤选择器。我希望用户输入他们想要的冠军，在这种情况下我有 ahri 和 leeSin，然后通过用户输入，我希望它选择字符串数组并随机打印其中一个元素。我想我已经很接近了，但我不能使用带有字符串 [] 的字符串。任何帮助将不胜感激。

namespace RandomLolChampSelector
{
    class Program
    {
        static void Main(string[] args)

        {
            string[] ahri = { "Academy", "Challenger", "Dynasty", "Foxfire", "Midnight", "Popstar" };
            string[] leeSin = { "Traditional", "Acolyte", "Dragon Fist", "Musy Thai", "Pool Party", "SKT T1", "Knockout" };

            // Creates title for application
            Console.WriteLine("Conor's Random League of Legends Skin Selector v0.1");
            Console.WriteLine(" ");
            Console.WriteLine(" ");

            Random rnd = new Random();

            Console.ForegroundColor = ConsoleColor.Gray;
            Console.WriteLine("What champion would you like to select a skin for?..    ");
            string champion = Console.ReadLine();

            foreach (string s in champion)
            {
                while (true)
                {
                    // Gets user to press a key to run the code
                    Console.Write("Press the 'enter' key for a random champion..     ");
                    string question = Console.ReadLine();

                    int randomNumber = rnd.Next(ahri.Length);
                    Console.WriteLine(ahri[randomNumber]);
                }
            }
        }
    }
}

Answer 1

一种方法是数组数组。看看https://msdn.microsoft.com/en-us/library/aa288453(v=vs.71).aspx，特别是他们谈论Array-of-arrays（锯齿状）的地方。

一种（可能）更直观的方法是数组字典。想一想：

Dictionary<string, string[]> myList = new Dictionary<string, string[]>();
myList.Add("ahri",new string[] { "Academy", "Challenger", "Dynasty", "Foxfire", "Midnight", "Popstar" });
//your other code
Console.WriteLine(myList[champion][randomNumber]);

考虑使用数组 myList[champion].Length 的长度作为随机数的界限，以避免出现越界错误。

Answer 2

试一试：

    static void Main(string[] args)
        {
            Dictionary<string, string[]> skins = new Dictionary<string, string[]>();
            skins.Add("ahri", new string[] { "Academy", "Challenger", "Dynasty", "Foxfire", "Midnight", "Popstar" });
            skins.Add("leesin", new string[] { "Traditional", "Acolyte", "Dragon Fist", "Musy Thai", "Pool Party", "SKT T1", "Knockout" });

            // Creates title for application
            Console.WriteLine("Conor's Random League of Legends Skin Selector v0.1\r\n\r\n");

            Random rnd = new Random();

            Console.ForegroundColor = ConsoleColor.Gray;

            Console.WriteLine("What champion would you like to select a skin for?..    ");
            string champion = Console.ReadLine().ToLower();

            Console.Write("Press the 'enter' key for a random champion..     ");
            Console.ReadLine();
            if(skins.ContainsKey(champion))
            {
                //return a random champion skin from the user input key in dict based on a random number from the length of the string array
                Console.WriteLine(skins[champion][rnd.Next(skins[champion].Length)]);

            }

        }

添加到Dictionary 允许您通过检查冠军名称或Key 来简化流程，然后根据长度从string[] 数组或Value 中随机选择皮肤，这要归功于一个介于 0 和数组中元素计数之间的随机数。

希望这有助于萌芽:)

---

编辑：我有点无聊并玩弄了这个（无聊是指试图避免完成我的作业），所以我想出了一些对你更友好的东西。人们可能会讨厌我为您提供整个解决方案，但它向您展示了处理这些情况的方法，因此我将其视为以身作则。看看吧。

static void Main(string[] args)
{
    Console.Clear(); //For a 'clean slate' on every execution, can ditch this if you want
    Console.ForegroundColor = ConsoleColor.Gray;

    Dictionary<string, string[]> skins = new Dictionary<string, string[]>();
    skins.Add("ahri", new string[] { "Academy", "Challenger", "Dynasty", "Foxfire", "Midnight", "Popstar" });
    skins.Add("leesin", new string[] { "Traditional", "Acolyte", "Dragon Fist", "Musy Thai", "Pool Party", "SKT T1", "Knockout" });

    Console.WriteLine("Conor's Random League of Legends Skin Selector v0.1\r\n\r\n");
    Console.WriteLine("What champion would you like to select a skin for? \r\nPress enter for a random champion...    ");

    var champion = Console.ReadLine(); 
    var rnd = new Random();
    if (champion.Equals(string.Empty))
    {
        var tmpList = Enumerable.ToList(skins.Keys);
        champion = tmpList[rnd.Next(tmpList.Count)];
    }
    else
    {
        champion = champion.Trim().ToLower(); 
    }

    Console.Write(string.Format("Champion {0} Selected \r\n", champion));

    if (skins.ContainsKey(champion)) 
    {
        Console.WriteLine(string.Format("Your random skin for {0} is: {1}\r\n", champion, skins[champion][rnd.Next(skins[champion].Length)]));
    }
    else
    {
        Console.Clear(); //clear the slate so console doesn't look cluttered.
        Main(args); 
    }
}

现在除了你在英雄和他们的皮肤中添加了 127 个奇怪的东西之外，这已经基本完成了。

简明扼要，短小精悍。

• 对处理所有用户输入的Console 进行一次调用，其余的都是自动化的
• 检查一个空的string，如果它找到一个这是有效的并输入击键，就好像他们输入了一个不正确的值，它不会在Dict中找到，所以无论如何它都会“重新启动”程序。所以他们有两个选择：输入一个以string Key 表示的正确值，或者将其留空并按回车键。
• 如果找到空的string（输入），它会将皮肤Dict 的Keys 转换为List，并根据元素的0 和Count() 之间的随机数随机选择一个内说Dict
• 否则，它将读取的输入转换为可用的字符串，然后继续
• 检查调整后的用户输入或随机选择的string key 与Dict 的Keys 是否匹配，如果找到，则根据数组元素的Length 或Count 输出随机皮肤在那个KeysValue下，此时程序存在。
• 如果未找到 Key（仅基于错误的用户输入），则会清除控制台并“重新启动”应用程序。

这远不是可用的最佳实现，但它确实有效，我真的看不出它的逻辑有问题，如果它在某个地方有问题，可以随时更新我。假设我现在应该做我的作业。这 15 分钟用得很好，很有趣。一定喜欢编码:)

希望这会有所帮助，也许您现在可以研究一些东西并扩展您的知识。

稍后

Answer 3

试试这个：

namespace RandomLolChampSelector
{
    class Program
    {
        static void Main(string[] args)

        {
            string[] ahri = { "Academy", "Challenger", "Dynasty", "Foxfire", "Midnight", "Popstar" };
            string[] leeSin = { "Traditional", "Acolyte", "Dragon Fist", "Musy Thai", "Pool Party", "SKT T1", "Knockout" };

            // Creates title for application
            Console.WriteLine("Conor's Random League of Legends Skin Selector v0.1");
            Console.WriteLine(" ");
            Console.WriteLine(" ");

            Random rnd = new Random();

            Console.ForegroundColor = ConsoleColor.Gray;
            Console.WriteLine("What champion would you like to select a skin for?..    ");
            string champion = Console.ReadLine();


                    // Gets user to press a key to run the code
             Console.Write("Press the 'enter' key for a random champion..     ");
             string question = Console.ReadLine();

             if(champion == "ahri")
             {
                int randomNumber = rnd.Next(ahri.Length-1);
                Console.WriteLine(ahri[randomNumber]);
             }
             else //If you have more than 2 arrays you will need another if or a case statement
             {
                int randomNumber = rnd.Next(leeSin.Length-1);
                Console.WriteLine(leeSin[randomNumber]);
             }
        }
    }
}

Answer 4

我已经修改了您的原始程序（尽可能多地保留您的代码）以产生预期的行为。请随时在此处按原样运行并研究我为使其工作所做的工作：

class Program
{
    static void Main(string[] args)
    {
        string[] ahri = { "Academy", "Challenger", "Dynasty", "Foxfire", "Midnight", "Popstar" };
        string[] leeSin = { "Traditional", "Acolyte", "Dragon Fist", "Musy Thai", "Pool Party", "SKT T1", "Knockout" };

        // Creates title for application
        Console.WriteLine("Conor's Random League of Legends Skin Selector v0.1");
        Console.WriteLine(" ");
        Console.WriteLine(" ");

        Random rnd = new Random();

        Console.ForegroundColor = ConsoleColor.Gray;

        // Stores what array has been selected:
        string[] champions;

        Console.WriteLine("What champion would you like to select a skin for?..    ");
        string championName = Console.ReadLine();
        if (championName.Equals("ahri", StringComparison.CurrentCultureIgnoreCase))
        {
            champions = ahri;
        }
        else if (championName.Equals("leeSin", StringComparison.CurrentCultureIgnoreCase))
        {
            champions = leeSin;
        }
        else 
        {
            // No champion selected, exit program:
            Console.WriteLine("No champion selected, quitting...");
            return;
        }

        while (true)
        {
            // Gets user to press a key to run the code
            Console.WriteLine("Press the 'enter' key for a random champion..     ");
            if (Console.ReadKey(true).Key == ConsoleKey.Enter)
            {                    
                int randomNumber = rnd.Next(champions.Length);
                Console.WriteLine(champions[randomNumber]);
            }
        }
    }
}