Question

using System;

namespace ConsoleApp3
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hi! What is your name?");
            string name = Console.ReadLine();
            Console.WriteLine("Hi {0} how are you? <Please write 'Good' or 'Bad'>", name);

            string howAre = Console.ReadLine();

            if (howAre == "Good")
            {
                Console.WriteLine("Excellent!");
                Console.WriteLine("<Press Any Key To Continue>");
                Console.ReadKey();
            }
            else if (howAre == "Bad")
            {
                Console.WriteLine("Don't {0} worry everyone always had a bad day :) " + name);
                Console.WriteLine("<Press Any Key To Continue>");
                Console.ReadKey();
            }
            else
            { 
                Console.WriteLine("<Please write 'Good' or 'Bad'> ");
                Console.WriteLine("<Press Any Key To Return>");
                Console.ReadKey();
                return;
            }
        }     
    }
}

Answer 1

您需要更改行

Console.WriteLine("Don't {0} worry everyone always had a bad day :) " + name)

要

Console.WriteLine("Don't {0} worry everyone always had a bad day :) ", name)

Answer 2

在C＃6之后，您可以使用字符串插值，这更具可读性和经济性：

Console.WriteLine($"Don't worry {name} everyone always had a bad day :)");

Answer 3

您需要更改此行：

Console.WriteLine("Don't {0} worry everyone always had a bad day :) " + name);

To This：

Console.WriteLine("Don't {0} worry everyone always had a bad day :) ", name);

<强>为什么吗

因为您使用+符号并且只打印string name后面的Console.writeline。

如果您将其更改为, name，则会在string name

的位置打印出{0}

Answer 4

在没有{0}的情况下，只需添加一些输入就可以使用字符串插值：https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/tokens/interpolated

示例：

Console.WriteLine($"Don't {name} worry everyone always had a bad day");

我的“{0}”占位符无效。有没有办法解决它们

4 个答案: