C# 控制台 case 语句

Question

using System;
using System.Collections.Generic;
using System.IO;
using System.Text;

namespace LittleQuizworld_3
{
    class Program
    {
    public string QuestionText; //Actual question text.
    public string[] Choices; //Array of answer from which user can choose.
    public int Answer; //Index of correct answer with Choices.



    static void Main(string[] args)

    {

        int correct = 0;
        int iChoice =0;

        Console.WriteLine("Hello Welcome to Litte Quiz World, We hope you will have fun here");
        Console.WriteLine("Please press enter to continues :) ");
        Console.ReadLine();
        while (iChoice != 4)
        {
        Console.WriteLine("Please select the following");
        Console.WriteLine("1.Play Game");
        Console.WriteLine("2.Future game");
        Console.WriteLine("3.Credits");
        Console.WriteLine("4.Exit");
        Console.ReadLine();
        iChoice = Convert.ToInt32(Console.ReadLine());



          using (StreamReader sr = new StreamReader("./quiz.txt"))
        {



           switch (iChoice)
           {

         case 1:

            while (!sr.EndOfStream)
            {
                Console.Clear();
                for (int i = 0; i < 5; i++)
                {
                    String line = sr.ReadLine();
                    if (i > 0)
                    {
                        if (line.Substring(0, 1) == "#") correct = i;
                        Console.WriteLine("{0}: {1}", i, line);
                    }
                    else
                    {
                        Console.WriteLine(line);
                    }
                }

                for (;;){
                {
                    Console.Write("Select Answer: ");
                    ConsoleKeyInfo cki = Console.ReadKey();
                    if (cki.KeyChar.ToString() == correct.ToString())
                    {
                        Console.WriteLine(" - Correct!");
                        Console.WriteLine("Press any key for next question...");
                        Console.ReadKey();

                    }
                    else
                    {
                        Console.WriteLine(" - Try again!");
                        Console.Clear();
                    }




                    case 2:

                    if (iChoice == 2)
                    {
                        Console.WriteLine("Future game of Little Quiz World");
                        Console.WriteLine("Little Quiz Would will continues working on the patch for this game");
                        Console.WriteLine("Also the new game which is planned will be call BattleShip World beta testing will be very soon ");
                        Console.WriteLine("Please stick close to us ");
                        Console.ReadLine();
                    }
                            break;
                    case 3:
                    if (iChoice == 3)
                    {
                        Console.WriteLine("Credit");
                        Console.WriteLine("We hope you enjoy the game and please feel free to give us feeback at email : [email protected]");
                        Console.ReadLine();
                    }
                    break;


                        }
                    }
                }
             }
            }
        }

    }
}

} 我创建了一个小测验游戏和一个小菜单系统，但我的案例陈述似乎不起作用，有人可以帮我吗？

Answer 1

撇开大括号的平衡不谈，请注意，在 case 2: 下使用 if (iChoice==2) 是多余的，因为您的 switch 语句位于 iChoice。 iChoice==3 也是如此。

编辑：
为了澄清起见，您应该写

case 2:
    if (iChoice == 2)
    {
        //...
    }

为

case 2:
    //...

但这并不是阻止代码编译的原因。正如其他人指出的那样，您的大括号不平衡，并且您将一些 case 语句放入循环中，而其他语句则没有。

Answer 2

检查你的牙套。它们不平衡——至少不是你想要的那样。

Answer 3

哇，你在一个函数中发生了很多事情。如果您将其分成多个函数，并从每个 case 语句中调用每个函数，那么跟踪问题可能会更容易。

此外，您还有看起来跳到循环中间的 case 语句。

Answer 4

撇开大括号的平衡不谈，请注意，在情况 2: 下使用 if (iChoice==2) 是多余的，因为您的 switch 语句位于 iChoice 上。 iChoice==3 也是如此。

抱歉，我不太明白，我是 C# 新手