c# - C# 石头、剪刀、布

Question

我正在用 C# 制作石头、剪刀、布游戏，目前在有人输入非 R、S 或 P 的输入时尝试显示消息时遇到问题。例如，我正在尝试获取默认值在 switch 语句中工作，但我没有运气。这就是我目前所拥有的。如果我遇到任何其他问题，请告诉我。

using System;

namespace Rockpaperscissors
{
    class Program
    {
        static void Main(string[] args)
        {
            string inputPlayer, Computer;
            int randomnum;
            string loop;
            bool keepPlaying = true;

            while (keepPlaying)
            {

                int wins = 0;
                int Loses = 0;
                int ties = 0;


                while (keepPlaying)
                {

                    Random myRandomObject = new Random();
                    randomnum = myRandomObject.Next(1, 4);
                    Console.Write("To play: enter R for Rock, S for Scissors, P for Paper.");
                    inputPlayer = Console.ReadLine();
                    inputPlayer = inputPlayer.ToUpper();

                    switch (randomnum)
                    {

                        case 1:
                            Computer = "Rock";
                            Console.WriteLine("The computer played Rock");
                            if (inputPlayer == "R")
                            {
                                Console.WriteLine("Tie!!\n\n");
                                ties++;
                            }
                            else if (inputPlayer == "P")
                            {
                                Console.WriteLine("You win!!\n\n");
                                wins++;
                            }
                            else if (inputPlayer == "S")
                            {
                                Console.WriteLine("Computer wins!!\n\n");
                                Loses++;
                            }
                            break;
                        case 2:
                            Computer = "Paper";
                            Console.WriteLine("The computer played Paper");
                            if (inputPlayer == "P")
                            {
                                Console.WriteLine("Tie!!\n\n");
                                ties++;
                            }
                            else if (inputPlayer == "R")
                            {
                                Console.WriteLine("Computer wins!!\n\n");
                                Loses++;
                            }
                            else if (inputPlayer == "S")
                            {
                                Console.WriteLine("You win!!\n\n");
                                wins++;
                            }
                            break;
                        case 3:
                            Computer = "Scissors";
                            Console.WriteLine("The computer played Scissors");
                            if (inputPlayer == "S")
                            {
                                Console.WriteLine("Tie!!\n\n");
                                ties++;
                            }
                            else if (inputPlayer == "R")
                            {
                                Console.WriteLine("You win!!\n\n");
                                wins++;
                            }
                            else if (inputPlayer == "P")
                            {
                                Console.WriteLine("Computer wins!!\n\n");
                                Loses++;
                            }
                            break;
                        default:                      
                            Console.WriteLine("Please enter a correct entry");  
                            break;
                    }

                    Console.WriteLine("Scores:\tWins:\t{0},\tLoses:\t{1},\tties:\t{2}", wins, Loses, ties);

                Console.WriteLine("Would you like to continue playing? (y/n)");
                loop = Console.ReadLine();
                if (loop == "y")
                {
                    keepPlaying = true;

                }
                else if (loop == "n")
                {
                    keepPlaying = false;
                }
                else
                {

                }

                }

            }

        }
    }
}

请帮忙!

Answer 1

这是我在控制台应用程序中使用过的一种非常有帮助的方法。实际上，我有几个用于从用户获取类型(例如 int 或 double)。它接受一个提示，该提示显示给用户，并包含一个可选的验证器方法，它将针对输入运行以查看其是否有效。

这是字符串输入的一个:

public static string GetStringFromUser(string prompt, Func<string, bool> validator = null)
{
    var isValid = true;
    string result;

    do
    {
        if (!isValid)
        {
            WriteLineColor("Invalid input, please try again.", ConsoleColor.Red);
        }
        else isValid = false;

        Console.Write(prompt);
        result = Console.ReadLine();
    } while (validator != null && !validator.Invoke(result));

    return result;
}

就您而言，您只需这样调用它:

string playerInput = GetStringFromUser(
    "To play: enter R for Rock, S for Scissors, P for Paper: ",
    x => x.ToUpper() == "R" || x.ToUpper() == "S" || x.ToUpper() == "P");

Console.WriteLine($"You entered: {playerInput}");

Console.Write("\nPress any key to continue...");
Console.ReadKey();

这是示例输出: