C#if语句在控制台游戏中不起作用（我是初学者，所以可能完全错了）

if

语句应该打印我是否在玩石头、布、剪刀的游戏中赢了、输了或画了。但这并没有发生

预期结果： 请输入石头、布或剪刀

计算机已选择： 纸

你赢了

实际结果： 请输入石头、布或剪刀

计算机已选择： 纸

一般来说，我对编程没有最好的理解，否则我可能会自己解决这个问题

我开始学习C#的原因是因为我现在在学校学习C#，所以我认为在家学习也会让我有更好的机会快速理解C#

这是我的密码，有什么问题吗？（请尽量简单，因为我几天前才真正开始学习C#）

---

问题就在这条线上：

Console.WriteLine(rpsOpt[new Random().Next(0, rpsOpt.Length)]);

您正在控制台输出上编写计算机选项，但实际上并没有将该选项存储在任何位置

string finalOpt = Console.ReadLine();

然后，上面的行等待另一个用户输入，您可能只是再次按下

Enter

键，这将导致一个空字符串存储在

finalOpt

变量中

之后，您将用户的第一选择与

finalOpt

变量中的空字符串进行比较，并且您的

if

条件都不能处理这种情况。这就是为什么你看不到任何输出

为了解决这个问题，您需要首先将随机选择存储到变量中，然后将其打印到控制台：

Console.WriteLine("The Computer has chosen:");
string finalOpt = rpsOpt[new Random().Next(0, rpsOpt.Length)];
Console.WriteLine(finalOpt);

---

问题就在这条线上：

Console.WriteLine(rpsOpt[new Random().Next(0, rpsOpt.Length)]);

您正在控制台输出上编写计算机选项，但实际上并没有将该选项存储在任何位置

string finalOpt = Console.ReadLine();

然后，上面的行等待另一个用户输入，您可能只是再次按下

Enter

键，这将导致一个空字符串存储在

finalOpt

变量中

之后，您将用户的第一选择与

finalOpt

变量中的空字符串进行比较，并且您的

if

条件都不能处理这种情况。这就是为什么你看不到任何输出

为了解决这个问题，您需要首先将随机选择存储到变量中，然后将其打印到控制台：

Console.WriteLine("The Computer has chosen:");
string finalOpt = rpsOpt[new Random().Next(0, rpsOpt.Length)];
Console.WriteLine(finalOpt);

---

以下代码行中存在错误

Console.WriteLine(rpsOpt[new Random().Next(0, rpsOpt.Length)]);
string finalOpt = Console.ReadLine();

您可以打印出随机的计算机选择。打印出所选内容后，您正在等待输入。因此字符串

finalOpt

包含用户输入，而不是随机选择

您必须将随机选择放入

finalOpt

字符串并打印出该字符串

string finalOpt = rpsOpt[new Random().Next(0, rpsOpt.Length)];
Console.WriteLine(finalOpt);

---

以下代码行中存在错误

Console.WriteLine(rpsOpt[new Random().Next(0, rpsOpt.Length)]);
string finalOpt = Console.ReadLine();

您可以打印出随机的计算机选择。打印出所选内容后，您正在等待输入。因此字符串

finalOpt

包含用户输入，而不是随机选择

您必须将随机选择放入

finalOpt

字符串并打印出该字符串

string finalOpt = rpsOpt[new Random().Next(0, rpsOpt.Length)];
Console.WriteLine(finalOpt);

---

您的代码在以下几行出现问题：

我更正了你的代码。 试试看：

using System;

namespace SimpleGame
{
    class Program
    {
        public delegate int SquareDelegate(int number);

        static void Main(string[] args)
        {
            string appName = "Rock, Paper, Scissors";
            string appVersion = "1.0.0";
            string author = "Rhys Keown";

            Console.WriteLine("{0}, Version {1}, Made By {2}", appName, appVersion, author);
            Console.WriteLine();

            Console.WriteLine("Please press any key to begin the game!");
            Console.ReadKey();

            // Ask for the user to input either Rock, Paper, Scissors
            Console.WriteLine("Please input either Rock, Paper or Scissors");
            string userOpt = Console.ReadLine();

            // Random option completed by the computer.
            string[] rpsOpt = new string[] { "Rock", "Paper", "Scissors" };
            Console.WriteLine("The computer has chosen:");


            // Computer Chosen value - Stored to 'b'
            string b = rpsOpt[new Random().Next(0, rpsOpt.Length)];


            //string finalOpt = Console.ReadLine();

            // If the selection of the user beats the computer then You Win! 
            // is printed and you are asked if you want to have another game.
            string a = userOpt;

            if (b == "Rock" && a == "Rock")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Paper" && a == "Paper")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Scissors" && a == "Scissors")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Rock" && a == "Scissors")
            {
                Console.WriteLine("You have lost");
            }

            else if (b == "Rock" && a == "Paper")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Scissors" && a == "Rock")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Scissors" && a == "Paper")
            {
                Console.WriteLine("You have lost");
            }

            else if (b == "Paper" && a == "Scissors")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Paper" && a == "Rock")
            {
                Console.WriteLine("You have lost");
            }
            else (b == "Paper" && a == "Rock")
            {
                Console.WriteLine("Something Wrong When Computing results..");
            }

            Console.ReadKey();
        }
    }
}

输出：

using System;

namespace SimpleGame
{
    class Program
    {
        public delegate int SquareDelegate(int number);

        static void Main(string[] args)
        {
            string appName = "Rock, Paper, Scissors";
            string appVersion = "1.0.0";
            string author = "Rhys Keown";

            Console.WriteLine("{0}, Version {1}, Made By {2}", appName, appVersion, author);
            Console.WriteLine();

            Console.WriteLine("Please press any key to begin the game!");
            Console.ReadKey();

            // Ask for the user to input either Rock, Paper, Scissors
            Console.WriteLine("Please input either Rock, Paper or Scissors");
            string userOpt = Console.ReadLine();

            // Random option completed by the computer.
            string[] rpsOpt = new string[] { "Rock", "Paper", "Scissors" };
            Console.WriteLine("The computer has chosen:");


            // Computer Chosen value - Stored to 'b'
            string b = rpsOpt[new Random().Next(0, rpsOpt.Length)];


            //string finalOpt = Console.ReadLine();

            // If the selection of the user beats the computer then You Win! 
            // is printed and you are asked if you want to have another game.
            string a = userOpt;

            if (b == "Rock" && a == "Rock")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Paper" && a == "Paper")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Scissors" && a == "Scissors")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Rock" && a == "Scissors")
            {
                Console.WriteLine("You have lost");
            }

            else if (b == "Rock" && a == "Paper")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Scissors" && a == "Rock")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Scissors" && a == "Paper")
            {
                Console.WriteLine("You have lost");
            }

            else if (b == "Paper" && a == "Scissors")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Paper" && a == "Rock")
            {
                Console.WriteLine("You have lost");
            }
            else (b == "Paper" && a == "Rock")
            {
                Console.WriteLine("Something Wrong When Computing results..");
            }

            Console.ReadKey();
        }
    }
}

---

您的代码在以下几行出现问题：

我更正了你的代码。 试试看：

using System;

namespace SimpleGame
{
    class Program
    {
        public delegate int SquareDelegate(int number);

        static void Main(string[] args)
        {
            string appName = "Rock, Paper, Scissors";
            string appVersion = "1.0.0";
            string author = "Rhys Keown";

            Console.WriteLine("{0}, Version {1}, Made By {2}", appName, appVersion, author);
            Console.WriteLine();

            Console.WriteLine("Please press any key to begin the game!");
            Console.ReadKey();

            // Ask for the user to input either Rock, Paper, Scissors
            Console.WriteLine("Please input either Rock, Paper or Scissors");
            string userOpt = Console.ReadLine();

            // Random option completed by the computer.
            string[] rpsOpt = new string[] { "Rock", "Paper", "Scissors" };
            Console.WriteLine("The computer has chosen:");


            // Computer Chosen value - Stored to 'b'
            string b = rpsOpt[new Random().Next(0, rpsOpt.Length)];


            //string finalOpt = Console.ReadLine();

            // If the selection of the user beats the computer then You Win! 
            // is printed and you are asked if you want to have another game.
            string a = userOpt;

            if (b == "Rock" && a == "Rock")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Paper" && a == "Paper")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Scissors" && a == "Scissors")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Rock" && a == "Scissors")
            {
                Console.WriteLine("You have lost");
            }

            else if (b == "Rock" && a == "Paper")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Scissors" && a == "Rock")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Scissors" && a == "Paper")
            {
                Console.WriteLine("You have lost");
            }

            else if (b == "Paper" && a == "Scissors")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Paper" && a == "Rock")
            {
                Console.WriteLine("You have lost");
            }
            else (b == "Paper" && a == "Rock")
            {
                Console.WriteLine("Something Wrong When Computing results..");
            }

            Console.ReadKey();
        }
    }
}

输出：

using System;

namespace SimpleGame
{
    class Program
    {
        public delegate int SquareDelegate(int number);

        static void Main(string[] args)
        {
            string appName = "Rock, Paper, Scissors";
            string appVersion = "1.0.0";
            string author = "Rhys Keown";

            Console.WriteLine("{0}, Version {1}, Made By {2}", appName, appVersion, author);
            Console.WriteLine();

            Console.WriteLine("Please press any key to begin the game!");
            Console.ReadKey();

            // Ask for the user to input either Rock, Paper, Scissors
            Console.WriteLine("Please input either Rock, Paper or Scissors");
            string userOpt = Console.ReadLine();

            // Random option completed by the computer.
            string[] rpsOpt = new string[] { "Rock", "Paper", "Scissors" };
            Console.WriteLine("The computer has chosen:");


            // Computer Chosen value - Stored to 'b'
            string b = rpsOpt[new Random().Next(0, rpsOpt.Length)];


            //string finalOpt = Console.ReadLine();

            // If the selection of the user beats the computer then You Win! 
            // is printed and you are asked if you want to have another game.
            string a = userOpt;

            if (b == "Rock" && a == "Rock")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Paper" && a == "Paper")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Scissors" && a == "Scissors")
            {
                Console.WriteLine("You have drawn");
            }

            else if (b == "Rock" && a == "Scissors")
            {
                Console.WriteLine("You have lost");
            }

            else if (b == "Rock" && a == "Paper")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Scissors" && a == "Rock")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Scissors" && a == "Paper")
            {
                Console.WriteLine("You have lost");
            }

            else if (b == "Paper" && a == "Scissors")
            {
                Console.WriteLine("You have won!!");
            }

            else if (b == "Paper" && a == "Rock")
            {
                Console.WriteLine("You have lost");
            }
            else (b == "Paper" && a == "Rock")
            {
                Console.WriteLine("Something Wrong When Computing results..");
            }

            Console.ReadKey();
        }
    }
}

---

“但这并没有发生”并不是很具体。请告诉我们您输入了什么，预期结果是什么，以及您的代码是如何无法实现的？

b

如果用户在第二次提示下再次输入，则只能使用石头、布或剪刀。编程时首先需要学习两件事，它们是编程和调试。在

if

语句之前的某个地方放置一个断点，然后逐步遍历代码。“这并没有发生”并不是很具体。请告诉我们您输入了什么，预期结果是什么，以及您的代码是如何无法实现的？

b

如果用户在第二次提示下再次输入，则只能使用石头、布或剪刀。编程时首先需要学习两件事，它们是编程和调试。在

if

语句之前的某个地方放置一个断点，然后逐步遍历代码。这个答案比你之前发布的答案好多少？这实际上解释了问题所在，而不仅仅是更正代码？@Crowcoder-我刚刚看到了问题，并将问题中的代码复制/粘贴到visual studio，找到了问题所在…然后解决问题并发布答案…这个答案比在你之前发布的那篇文章实际上解释了问题所在，而不仅仅是更正代码？@Crowcoder-我只是看到了问题，并将问题中的代码复制/粘贴到visual studio，找到了问题所在……然后解决问题并发布答案。。。。