尝试使用 c# 编写简单的'favorite color'测验

Question

公平警告，我是该语言的完整初学者。

我想使用C＃进行简单的测验，该测验要求用户输入喜欢的颜色，然后根据它们输入的内容进行响应。现在，我只是在使用一堆IF语句来检查输入，但这要求我复制/粘贴这些if nif for每种颜色。有什么方法可以使用某种阵列，让我将所有颜色和响应放在一起？我知道您可以将数组用于数字，但是我无法弄清楚您是否可以对单词进行相同的操作。

再次，我是一个非常裸露的骨头的初学者，所以如果这是一个愚蠢的问题，我道歉。

对不起，这是我的代码：

using System;
namespace Whee
{
    class Program
    {
          static void Main(string[] args)
          {
               Console.WriteLine("What is your favorite color?");
               string color = Console.ReadLine();
               if (color == "blue")
               {
                   Console.WriteLine ("You must be a calm person.");
               }
               if else (color == "red")
               { 
                   Console.WriteLine ("You must be a Sith Lord.");
               }
               if (color == "green")
               {
                   Console.WriteLine ("Dolla bills y'all!");
               }
               if (color == "orange")
               {
                   Console.WriteLine ("What is this I don't even");
               }
               else
               {
                   Console.WriteLine ("You fail at colors. Try again.");
               }
      }
}

Answer 1

替代通常建议的开关语句的替代方法是将您的值放在字典中。

然后，您可以将字典搜索输入值作为键，并返回该字典条目的值(如果存在(。否则，您可以输出"颜色失败。再试一次"。消息。

Dictionary<string, string> colors = new Dictionary<string, string>();
colors.Add("red", "You must be a Sith Lord.");
colors.Add("blue", "You must be a calm person.");
colors.Add("green", "Dolla bills y'all!");
colors.Add("orange", "What is this I don't even");
string color = Console.ReadLine();
string response = null;
colors.TryGetValue(color, out response);
Console.WriteLine(response ?? "You fail at colors. Try again.");

从长远来看，此方法可以更容易地维护，并且如果此应用程序复杂性增长，则不一定需要重新编译(Switch语句(。相反，可以将其从数据库，配置文件或任何适合这种情况的情况下提取。此数据源可以在运行时更新，而无需重新启动应用程序。

Answer 2

如注释中所述，您可以使用这样的'switch'语句：

    static void Main(string[] args)
    {
        Console.WriteLine("What is your favorite color?");
        string color = Console.ReadLine();
        string response = "";
        switch(color)
        {
            case "blue":
                response = "You must be a calm person.";
                break;
            case "red":
                response = "You must be a Sith Lord.";
                break;
            case "green":
                response = "Dolla bills y'all!";
                break;
            case "orange":
                response = "What is this I don't even";
                break;
            default:
                response = "You fail at colors. Try again.";
                break;
        }
        Console.WriteLine(response);
    }

Answer 3

当您有一组if...then时，只有1个一致的值是转置switch...case结构"

(

    string ColorResponse;
    switch (color) {
        case "blue": ColorResponse = "You must be a calm person."; break;
        case "red": ColorResponse = "You must be a Sith Lord."; break;
        case "green": ColorResponse = "Dolla bills y'all!"; break;
        case "orange": ColorResponse = "What is this I don't even"; break;
        // Added this, you can use multiple matches with the same output
        case "fuschia":
        case "chartous": ColorResponse = "Interesting shades."; break;

        // You can add more logic in as well
        case "caramel":
        case "banana":
            if (color == "caramel") { ColorResponse = "I like caramel on sundaes"; }
            else { ColorResponse = "Banana splits are best with 2 cherries"; 
            break;
        // Always end with **default**
        default: ColorResponse = "You fail at colors. Try again."; break;
    }
    Console.WriteLine(ColorResponse);

Answer 4

您还可以用do{}while()的顺序使游戏循环结束。

例如：

do
{
    Console.WritLine("What is your favorit color? (Enter QUIT to stop)");
    String color = Console.ReadLine();
    String output = "";
    switch(color)
    {
        case "red":
            output = "You must be a Sith Lord";
            break;
        case "QUIT":
            output = "Good bye, thanks for playing!";
            break;
    }
    Console.WriteLine(output);
}while(!Color.Equals("QUIT"))