如何在程序中使用tryParse方法？ [英] How do I use the tryParse method in my program?

问题描述

我编写了这个程序并要求用户猜测20到30之间的数字并避免用户输入类似字母的内容，我使用了某些代码，但我想知道如何使用tryParse方法。有人可以把tryParse方法放在我的代码中吗？

 使用系统; 
 
  class  ApplicationEntry 
 {
  static   void  Main（ string  [] args）
 {
  bool  repeat =  true ，repeat2 =  true ，repeat3 = 真; 
  while （repeat ==  true ）
 {
 repeat2 =  true ; 
随机r = 新 Random（）; 
  int  numb =（r.Next（ 20 ， 30 ））; 
  while （repeat2 ==  true ）
 {
 Console。 WriteLine（ 请输入20到30之间的数字）; 
  int  guess1 = Convert.ToInt32（Console.ReadLine（））; 
 
  if （（guess1 <   20  || guess1 >   30 ）&& guess1！= numb ）
 {
 Console.WriteLine（ 无效。请输入20到30之间的数字 ）; 
 repeat3 =  false ; 
} 
 其他 如果（guess1 == numb）
 { 
 Console.WriteLine（ 干得好）; 
 repeat2 =  false ; 
 repeat3 =  true ; 
} 
  else  
 {
 Console.WriteLine（ 错误！再试一次）; 
 repeat2 =  true ; 
 repeat3 =  false ; 
} 
  while （repeat3 ==  true ）
 {
 Console.WriteLine（ 你想再玩一次吗？）; 
  string  answer = Console.ReadLine（）; 
  if （answer ==   yes  || answer ==  是 || answer ==   YES）
 {
 repeat3 =  false < /跨度>; 
 repeat =  true ; 
 repeat2 =  false ; 
} 
  else   if （answer ==   no || answer ==  否 || answer ==   NO）
 {
 repeat =  false ; 
 repeat3 =  false ; 
} 
  else  
 {
 Console.WriteLine（ 我不明白）; 
} 
 
 
} 
 
} 
} 
 
 Console.Write（  \ n按任意键退出程序：）; 
 Console.ReadKey（）; 
} 
 
} 

解决方案

我可以推荐一个NumericUpDown吗？

您已经发布了两次问题，顺便说一句，我已经在我如何使用tryParse方法发布了解决方案在我的计划中？ [ ^ ]

我理解它但我不确定如何将它实现到我的代码中

I wrote this program and asks a user to guess a number between 20 and 30 and to avoid the user entering something like a letter, I used a certain code but I would like to know how to use the tryParse method. Could someone please put the tryParse method in my code?

using System;

class ApplicationEntry
{
    static void Main(string[] args)
    {
        bool repeat = true, repeat2 = true, repeat3 = true;
        while (repeat == true)
        {
            repeat2 = true;
            Random r = new Random();
            int numb = (r.Next(20, 30));
            while (repeat2 == true)
            {
                Console.WriteLine("Please enter a numbers between 20 and 30");
                int guess1 = Convert.ToInt32(Console.ReadLine());

                if ((guess1 < 20 || guess1 > 30) && guess1 != numb)
                {
                    Console.WriteLine("Invalid. Please enter a number between 20 and 30");
                    repeat3 = false;
                }
                else if (guess1 == numb)
                {
                    Console.WriteLine("Good job");
                    repeat2 = false;
                    repeat3 = true;
                }
                else
                {
                    Console.WriteLine("Wrong! Try again");
                    repeat2 = true;
                    repeat3 = false;
                }
                while (repeat3 == true)
                {
                    Console.WriteLine("Would you like to play again?");
                    string answer = Console.ReadLine();
                    if (answer == "yes" || answer == "Yes" || answer == "YES")
                    {
                        repeat3 = false;
                        repeat = true;
                        repeat2 = false;
                    }
                    else if (answer == "no" || answer == "No" || answer == "NO")
                    {
                        repeat = false;
                        repeat3 = false;
                    }
                    else
                    {
                        Console.WriteLine("I didn't understand that");
                    }
                    

                 }

             }
          }

            Console.Write("\nPress any key to exit program: ");
            Console.ReadKey();
     } 

}

解决方案

May I recommend a NumericUpDown?

You have posted your question two times, BTW, I have already posted solution at How do I use the tryParse method in my program?[^]

I sort of understand it but i''m not sure how to implement it into my code

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