java - 涉及方法未定义类型的复杂问题

Question

我目前正在编写这段程序，您可以在其中猜测计算机随机生成的数字。但是我在 VS 代码中尝试运行它时经常得到的结果是:extracted(input) 方法对于 RandomNumber 类型是未定义的。我在谷歌和其他平台上搜索并注意到了类似的问题，但我似乎无法理解他们在说什么。因此，如果有人会这么好并向我解释问题是什么，我们将不胜感激。我还想知道这是否可能是软件错误，因为我的一个 friend 能够在 Eclipse 中完美地运行这段代码，而我不能在 VS 代码中运行。

代码:

import java.util.Scanner;

public class RandomNumber
{
    public static void main(String [] args )
    {
        int i = (int)( Math.random() * 101);
        int NumberToGuess = i;
        int NumberGuessed;
        int NumberOfTries;
        Scanner input = new Scanner(System.in);
        int GuessedNumber;
        boolean win = false;

        while (win == false)
        {
            System.out.print( "Take a Guess Between Number 1 ~ 100! ");
            GuessedNumber = extracted(input);
            NumberOfTries++;

            if ( NumberGuessed < NumberToGuess );
            {
                System.out.print( "Your Guessed Number is Too Low!" );
            }
            if ( NumberGuessed > NumberToGuess )
            {
                System.out.print( " Your Guessed Number is Too High!");
            }
            else if ( GuessedNumber == NumberToGuess )
            {
                win  = true;
            }

        }

        System.out.print( "Your Guessed Number is Correct! You Win!");
        System.out.print( "The Number To Guess Was:" + NumberToGuess );
        System.out.print( "The Total Number Of Tries You Took is:" + NumberOfTries );
    }
}

Answer 1

让我们编辑您的代码，使其正确无误:

public static void main(String[] args) {
    int i = (int)( Math.random() * 101);
    int NumberToGuess = i;
    System.out.println("rand is " + NumberToGuess);
    int NumberOfTries = 0;
    Scanner input = new Scanner(System.in);
    int GuessedNumber;
    boolean win = false;

    while (win == false)
    {
        System.out.print( "Take a Guess Between Number 1 ~ 100! ");
        GuessedNumber = input.nextInt();
        NumberOfTries++;

        if ( GuessedNumber < NumberToGuess )
        {
            System.out.print( "Your Guessed Number is Too Low!" );
        }
        else if ( GuessedNumber > NumberToGuess )
        {
            System.out.print( " Your Guessed Number is Too High!");
        }
        else 
        {
            win  = true;
        }

    }

    System.out.print( "Your Guessed Number is Correct! You Win!");
    System.out.print( "The Number To Guess Was:" + NumberToGuess );
    System.out.print( "The Total Number Of Tries You Took is:" + NumberOfTries );

}

首先，删除参数NumberGuessed，它是奇数。

然后，我们需要读取用户猜测的整数:GuessedNumber = input.nextInt();。

之后，我们需要将尝试计数器初始化为 0:int NumberOfTries = 0;

最后一部分，我们需要更正 if、else if 和 else 语句:

if ( GuessedNumber < NumberToGuess )
{
    System.out.print( "Your Guessed Number is Too Low!" );
}
else if ( GuessedNumber > NumberToGuess )
{
    System.out.print( " Your Guessed Number is Too High!");
}
else 
{
    win  = true;
}