c# - 陷入无限 if 循环

Question

我正在 Visual Studio 2015 中为我的类(class)开发一个 C# 控制台骰子模拟实验室。我根据用户的响应将我的程序分解为三个 if 循环。如果用户未输入有效响应，我有一个专用的 do while 循环。由于某种原因，我陷入了那个循环，无法摆脱。最重要的是，因为它是告诉用户输入有效的响应，所以它是第一个 if 语句。因此，即使我输入“y”、“Y”、“n”或“N”，它仍然会初始化。这是有问题的部分。

        // get response from user
        response = ReadLine();

        // loop starts if user does not reply with valid response in order to retrieve a valid response
        if (response != "N" || response != "Y" || response != "n" || response != "y")
        {
            do
            {
                WriteLine("Please reply with Y or N");
                response = ReadLine();
            }
            while (response != "N" || response != "Y" || response != "n" || response != "y");
        }

我正在使用 or 运算符，所以我不明白为什么它会这样循环。

Answer 1

response != "N" || response != "Y" || response != "n" || response != "y"

应该是

response != "N" && response != "Y" && response != "n" && response != "y"

因为如果您点击其中一个有效响应，您应该退出循环