使用布尔值的问题？

Question

我认为我要完成的任务很明显，但我是编码新手也很明显。这是我的代码，它在到达 "Would you like to run a program?" 之前工作正常，在这种情况下，它总是像用户输入的那样运行 "yes"。我是完全错误地解决这个问题还是只是写错了？

namespace ConsoleApplication2
{
    class Program
    {
        static void Main(string[] args)
        {
            string mystring = "What is your name?";
            Console.WriteLine(mystring);
            string UserInput = Console.ReadLine();
            string Name = UserInput;
            Console.WriteLine("Hello " + Name);
            Console.WriteLine("Would you like to run a program?");
            bool UserIput2;
            Console.ReadLine();
            bool Yes = true;
            bool No = false;
            if (UserIput2 = (true)) Console.WriteLine("What would you like to run? (Type help for a list of valid programs)");
            else if (UserIput2 = (false)) Console.WriteLine("Goodbye");
            Console.ReadLine();
            Console.ReadLine();

        }
    }
}

Answer 1

试试这个，我在这里为 UserIput2 分配输入并将其与 "yes" 或 "no" 进行比较。你可以相应地改变它

 string mystring = "What is your name?";
        Console.WriteLine(mystring);
        string UserInput = Console.ReadLine();
        string Name = UserInput;
        Console.WriteLine("Hello " + Name);
        Console.WriteLine("Would you like to run a program?");
        string UserIput2= Console.ReadLine();
        if (UserIput2.ToLower() == "yes") Console.WriteLine("What would you like to run? (Type help for a list of valid programs)");
        else if (UserIput2.ToLower() == "no") Console.WriteLine("Goodbye");
        Console.ReadLine();
        Console.ReadLine();

Answer 2

boolean类型是二进制的。想象一下，这种类型就像电灯开关一样工作。它只能有 2 种状态 - 打开 true 和关闭 false。仅将此数据类型用于在两种可能状态之间切换。

示例 C#：

bool result = (2 > 1); //Will result in true because 2 is great as 1

bool result = (2 < 1); //Will result in false because 2 is not less as 1

Answer 3

在您当前的代码中，您丢弃用户输入：

Console.WriteLine("Would you like to run a program?");
bool UserIput2;
Console.ReadLine(); // <- input is discarded

相反，您应该分配它给UserIput2:

Console.WriteLine("Would you like to run a program?");

// we assume that answer is positive (UserIput2 == true) 
// if and only if user put "yes" in any register ("YES", "Yes", "yes"...)    
bool UserIput2 = String.Equals(
  Console.ReadLine(), 
  "yes", 
  StringComparison.OrdinalIgnoreCase);

if的另一个问题：=是赋值，而不是比较：

 if (UserIput2 = (true)) Console.WriteLine(...);

表示将true赋值给UserIput2，然后检查。正确的实现是

if (UserIput2) 
  Console.WriteLine("What would you like to run? (Type help for a list of valid programs)");
else 
  Console.WriteLine("Goodbye");

使用布尔值的问题？

Questions using booleans?

c#

console

console-application

visual-studio