c# - 我怎样才能在 switch 语句中有一个案例，让用户输入要显示的字符串

Question

所以我得到了这段代码。我有它，所以当用户输入数字 1-4 时，它会根据他们输入的数字在开头显示不同的说法和他们的名字。我想要做的是，当他们输入 -1 而不是 1、2、3 或 4 时，它允许他们输入自己的语句来输出。

using System;

namespace TryIt  
{    
 class Conversation  
  {
    // Declare constants that define the input range
    private const int MIN = -1;
    private const int MAX = 4; 

    // Declare constants for the colors to be used
    private const ConsoleColor INPUT_COLOR = ConsoleColor.Green;
    private const ConsoleColor PROMPT_COLOR = ConsoleColor.Blue;
    private const ConsoleColor ERROR_COLOR = ConsoleColor.Red;
    private const ConsoleColor MESSAGE_COLOR = ConsoleColor.White;
    private const ConsoleColor BACKGROUND_COLOR = ConsoleColor.DarkGray;

    private String name;

    public Conversation()
    {
        Console.Title = "The Best TryIt Program";
        Console.BackgroundColor = BACKGROUND_COLOR;
        Console.Clear();
    }

    public void go()
    {
        getName();
        int number = getNumber();
        displayMessage(number);

        Console.ForegroundColor = ConsoleColor.Gray;
        Console.WriteLine();
    }

    private void getName()
    {
        Console.ForegroundColor = PROMPT_COLOR;
        Console.Write("Enter your name.   ");
        Console.ForegroundColor = INPUT_COLOR;

        // This will ask what your name is and prompt you to enter it.
        name = Console.ReadLine();
    }

    private int getNumber()
    {
        int input;

        // int input will take your name and display it back to you
        do
        {
            Console.ForegroundColor = PROMPT_COLOR;
            Console.Write("\nEnter a number from 1 to 4.  ");
            Console.ForegroundColor = INPUT_COLOR;

            // This will ask you for a number
            input = Convert.ToInt16(System.Console.ReadLine());

            // If you don't put in a valid number it will tell you
            if (input < MIN || input > MAX)
            {
                Console.ForegroundColor = ERROR_COLOR;
                Console.WriteLine("Invalid Number!");
            }
        } while (input < MIN || input > MAX);

        return input;
    }

    private void displayMessage(int choice)
    {
        String phrase = " ";

        // Declares the variable (a string) for the output messages.
        switch (choice)
        {
            case 1: phrase = " is a genius!"; break;
            case 2: phrase = " is amazing!"; break;
            case 3: phrase = " came to chew bubblegum" + 
                    ", kick butt " + "and is all out of gum."; break;
            case 4: phrase = " is a rockstar!"; break;
        }


        Console.WriteLine();
        Console.ForegroundColor = MESSAGE_COLOR;

        // This will display the message you selected 10 times
        for (int counter = 0; counter < 10; counter++)
        {
            Console.WriteLine(counter + ") " + name + phrase);
        }
    }
}

Answer 1

switch(choice)
{
   case 1: ...
      .
      .
      .
   case -1: Console.WriteLine("Put in your own saying: ");
            phrase = " " + Console.ReadLine();
            break;
}

这个 switch case 会在输入“-1”时询问你是否输入谚语，然后将其写入短语。在 switch case 之后，您可以像上面的代码一样继续。