c# - 学习 C#，编写了错误的程序，需要帮助了解为什么它不能按我想要的方式运行

Question

我是编码新手，我编写了这个控制台读取小程序来尝试理解数组、方法等。
我知道我的代码有很多错误并且可能没有正确编写(按书本)。
不过，我想要一些关于如何修复我的程序的帮助，它有一个问题，控制台让我输入一个数字，但它没有从我的选择方法中读取。我们将不胜感激任何帮助。

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace PalacioGameImproved
{
class Program
{
    static void Main(string[] args)
    {
        WelcomeMessage();
        choices();

    }


    public static string WelcomeMessage()
    {
        string writeLines;
        Console.WriteLine("Pick a DooWop");
        Console.WriteLine("{0,15}", "0 = Johnny");
        Console.WriteLine("{0,13}", "1 = Nick");
        Console.WriteLine("{0,15}", "2 = Conrad");
        Console.WriteLine("{0,14}", "3 = Diane");
        Console.WriteLine("{0,13}", "4 = Rick");
        writeLines = Console.ReadLine();
        return writeLines;
    }

    public static void choices()
    {


        string[] names = new string[5];
        names[0] = "Johnny";
        names[1] = "Nick";
        names[2] = "Conrad";
        names[3] = "Diane";
        names[4] = "Rick";

        string UserInput = Console.ReadLine();

        if (UserInput == "0")
        {
            Console.WriteLine("is it the array");
        }

        else if (UserInput == "1")
        {
            Console.WriteLine(names[1]);
        }

        else if (UserInput == "2")
        {
            Console.WriteLine(names[2]);
        }

        else if (UserInput == "3")
        {
            Console.WriteLine(names[3]);
        }

        else if (UserInput == "4")
        {
            Console.WriteLine(names[4]);
        }
        else
        {
            Console.WriteLine("That was not one of the choices, please try again.");
            WelcomeMessage();
        }
    }
}

Answer 1

您使用 Console.ReadLine 2 次。 .net Fiddle example你的代码应该是

using System;

public class Program
{
    public static void Main()
    {
       WelcomeMessage();
       choices();
    }

    public static void WelcomeMessage()
    {
       Console.WriteLine("Pick a DooWop");
       Console.WriteLine("{0,15}", "0 = Johnny");
       Console.WriteLine("{0,13}", "1 = Nick");
       Console.WriteLine("{0,15}", "2 = Conrad");
       Console.WriteLine("{0,14}", "3 = Diane");
       Console.WriteLine("{0,13}", "4 = Rick");
   }

   public static void choices()
   {
      string[] names = new string[5];
      names[0] = "Johnny";
      names[1] = "Nick";
      names[2] = "Conrad";
      names[3] = "Diane";
      names[4] = "Rick";

      string UserInput = Console.ReadLine();

      if (UserInput == "0")
      {
         Console.WriteLine("is it the array");
      }

      else if (UserInput == "1")
      {
         Console.WriteLine(names[1]);
      }

      else if (UserInput == "2")
      {
         Console.WriteLine(names[2]);
      }

      else if (UserInput == "3")
      {
         Console.WriteLine(names[3]);
      }

      else if (UserInput == "4")
      {
          Console.WriteLine(names[4]);
      }
      else
      {
          Console.WriteLine("That was not one of the choices, please try again.");
          WelcomeMessage();
      }
   }
}