使用布尔值的问题

本文关键字：问题 布尔值 | 更新日期: 2023-09-27 18:09:53

我想这是相当明显的我想要完成的，但也很明显，我是一个新的编码。这是我的代码，它工作得很好，直到它到达"你想要运行一个程序吗?"在这种情况下，它总是表现得像用户输入"是"。是我写错了还是写错了?

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();
        }
    }
}

使用布尔值的问题

试试这个，在这里我分配UserIput2与输入并将其与"是"或"否"进行比较。您可以将其更改为相应的

 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();

在您当前的代码中，您丢弃了用户输入:

Console.WriteLine("Would you like to run a program?");
bool UserIput2;
Console.ReadLine(); // <- input is discarded
相反，您应该将分配给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: =的另一个问题是分配，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");

boolean类型为二进制。想象一下这种类型像电灯开关一样工作。它只能有两种状态——打开true和关闭false。此数据类型仅用于在两种可能的状态之间切换。

c#示例:

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
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