如何允许用户随时退出控制台应用程序？

Question

有人可以帮我在此代码中随时选择退出应用吗？另外，我想知道为什么当用户输入字符串而不是数字时，我必须为消息"That is not an integer"按两次输入？

using System;
using System.Threading;

namespace farino_HighLow
{
    public class Game
    {
        // TAKES AND TRACKS USER INPUT
        public void PlayGame()
        {
            // CREATES VARIABLE FOR INPUT FROM THE USER (IF THEY MAKE AN INVALID GUESS OR WANT TO EXIT),
            // THE RANDOM VALUE GENERATED, THE USERS GUESS, AND A COUNTER FOR HOW MANY GUESSES THE USER TAKES
            Random random = new Random();

            int returnValue = random.Next(1, 100);
            string input;
            string line;
            int guess = 0;
            int count = 0;

            Console.Beep(1000, 2000);

            // INSTRUCTS USER WHAT TO DO
            Console.WriteLine("Guess a number between 1-100");
            Console.WriteLine("Hit Q at any time to exit the game");

            do
            {
                input = Console.ReadLine();

                try
                {
                    guess = Convert.ToInt32(input);
                }
                catch
                {
                    if (input == "Q")
                    {
                        break;
                    }
                }

                line = Console.ReadLine();

                if (!int.TryParse(line, out guess))
                    Console.WriteLine("Not an integer!");

                // MAKES SURE USER ENTERS A NUMBER WITHIN THE PARAMETERS OF THE GAME
                // COUNTS THE USER GUESSES
                // TELLS USER IF THEIR GUESS WAS RIGHT OR WRONG AND DIRECTS THEM TOWARDS A BETTER GUESS
                if (guess >= 1 && guess <= 100)
                {
                    if (guess > returnValue)
                    {
                        Console.Beep(100,2000);
                        Console.WriteLine("Guess Again! Your guess is too HIGH");
                        count += 1;
                    }
                    if (guess < returnValue)
                    {
                        Console.Beep(300,2000);
                        Console.WriteLine("Guess Again! Your guess is too LOW");
                        count += 1;
                    }
                    if (guess == returnValue)
                    {
                        Console.Beep(50,2000);
                        Console.Beep(60,2000);
                        Console.Beep(70,2000);
                        Console.WriteLine("You got it RIGHT!!!!!!");
                        count += 1;
                        Console.WriteLine("It took you" + count + "guesses to win the game.");
                    }
                    if (guess < 1)
                    {
                        Console.WriteLine("That is not a valid entry");
                    }
                    if (guess > 100)
                    {
                        Console.WriteLine("That is not a valid entry");
                    }
                }
            } while (guess != returnValue);

            Thread.Sleep(5000);
            Console.Clear();
        }
    }
}

Answer 1

尝试此代码

using System;
using System.Threading;

namespace farino_HighLow
{
    public class Game
    {
        // TAKES AND TRACKS USER INPUT
        public void PlayGame()
        {
            // CREATES VARIABLE FOR INPUT FROM THE USER (IF THEY MAKE AN INVALID GUESS OR WANT TO EXIT),
            // THE RANDOM VALUE GENERATED, THE USERS GUESS, AND A COUNTER FOR HOW MANY GUESSES THE USER TAKES
            Random random = new Random();

            int returnValue = random.Next(1, 100);
            string input;
            string line;
            int guess = 0;
            int count = 0;

            Console.Beep(1000, 2000);

            // INSTRUCTS USER WHAT TO DO
            Console.WriteLine("Guess a number between 1-100");
            Console.WriteLine("Hit Q at any time to exit the game");

            do
            {
                input = Console.ReadLine();

                try
                {
                    guess = Convert.ToInt32(input);
                }
                catch
                {
                    if (input == "Q")
                    {
                        //after press Q exit from application
                        return;


                    }
                }

                line = Console.ReadLine();

                if (!int.TryParse(line, out guess))
                    Console.WriteLine("Not an integer!");

                // MAKES SURE USER ENTERS A NUMBER WITHIN THE PARAMETERS OF THE GAME
                // COUNTS THE USER GUESSES
                // TELLS USER IF THEIR GUESS WAS RIGHT OR WRONG AND DIRECTS THEM TOWARDS A BETTER GUESS
                if (guess >= 1 && guess <= 100)
                {
                    if (guess > returnValue)
                    {
                        Console.Beep(100, 2000);
                        Console.WriteLine("Guess Again! Your guess is too HIGH");
                        count += 1;
                    }
                    if (guess < returnValue)
                    {
                        Console.Beep(300, 2000);
                        Console.WriteLine("Guess Again! Your guess is too LOW");
                        count += 1;
                    }
                    if (guess == returnValue)
                    {
                        Console.Beep(50, 2000);
                        Console.Beep(60, 2000);
                        Console.Beep(70, 2000);
                        Console.WriteLine("You got it RIGHT!!!!!!");
                        count += 1;
                        Console.WriteLine("It took you" + count + "guesses to win the game.");
                    }
                    if (guess < 1)
                    {
                        Console.WriteLine("That is not a valid entry");
                    }
                    if (guess > 100)
                    {
                        Console.WriteLine("That is not a valid entry");
                    }
                }
            } while (guess != returnValue);

            Thread.Sleep(5000);
            Console.Clear();
        }
    }
}

Answer 2

只需使用：Environment.Exit(0);或Application.Exit();

即可

if(condition is true)
{
   Environment.Exit(0);
}
else
{
   //continue
}