询问用户是否希望继续[关闭]答案

【问题标题】：Ask user if they wish to continue [closed]询问用户是否希望继续[关闭]
【发布时间】：2016-04-16 19:12:32
【问题描述】：

我编写了一个在命令行上玩井字游戏的程序，但我想添加一个功能，一旦游戏完成，它会询问用户是否想再次玩，如果他们输入 Y，那么它会再次玩如果他们输入 N 它的休息时间，但我不确定从哪里开始 do while 循环以及在哪里关闭它。

import java.util.Scanner;

public class test3
{
static int A1, A2, A3, B1, B2, B3, C1, C2, C3;

static Scanner sc = new Scanner(System.in);

public static void main(String[] args)
{
System.out.println();
System.out.println();

  String prompt = "Welcome to our X and O's game . Please take your first go: ";
    String playerMove = "";
    String cpuMove = "";
    boolean gameIsDecided = false;

   for (int i = 1; i <=9; i++)
    {
        //Gives the human player its identity(1) and sets out what happens if player wins

        playerMove = getMove(prompt);
        updateBoard(playerMove, 1);
        displayBoard();
        if (isGameDecided())
        {
            System.out.println("Congratulations , you have beaten me!!");
            gameIsDecided = true;
            break;
        }

      if (i < 9)
        {
            cpuMove = getCpuMove();
            System.out.println(cpuMove);
            updateBoard(cpuMove, 2);
            displayBoard();
            if (isGameDecided())
            {
                System.out.println("Unlucky , I win. Better luck next time :");
                gameIsDecided = true;
                break;
            }
            prompt = "Take your next go: ";
            i++;
        }
    }
    if (!gameIsDecided)
        System.out.println("So nothing can separate us , the game is a draw !!");
}

       public static String getMove(String prompt)
{
    String turn;
    System.out.print(prompt);
    do
    {
        turn = sc.nextLine();
        if (!isAcceptablePlay(turn))
        {
            System.out.println("Unfortunately this move isn't valid , please try again !!");
        }
    } while (!isAcceptablePlay(turn));
    return turn;
}

     public static boolean isAcceptablePlay(String turn)
{
    if (turn.equalsIgnoreCase("A1") & A1 == 0)
        return true;
    if (turn.equalsIgnoreCase("A2") & A2 == 0)
        return true;
    if (turn.equalsIgnoreCase("A3") & A3 == 0)
        return true;
    if (turn.equalsIgnoreCase("B1") & B1 == 0)
        return true;
    if (turn.equalsIgnoreCase("B2") & B2 == 0)
        return true;
    if (turn.equalsIgnoreCase("B3") & B3 == 0)
        return true;
    if (turn.equalsIgnoreCase("C1") & C1 == 0)
        return true;
    if (turn.equalsIgnoreCase("C2") & C2 == 0)
        return true;
    if (turn.equalsIgnoreCase("C3") & C3 == 0)
        return true;
    return false;
}

   public static void updateBoard(String turn, int player)
{
    if (turn.equalsIgnoreCase("A1"))
        A1 = player;
    if (turn.equalsIgnoreCase("A2"))
        A2 = player;
    if (turn.equalsIgnoreCase("A3"))
        A3 = player;
    if (turn.equalsIgnoreCase("B1"))
        B1 = player;
    if (turn.equalsIgnoreCase("B2"))
        B2 = player;
    if (turn.equalsIgnoreCase("B3"))
        B3 = player;
    if (turn.equalsIgnoreCase("C1"))
        C1 = player;
    if (turn.equalsIgnoreCase("C2"))
        C2 = player;
    if (turn.equalsIgnoreCase("C3"))
        C3 = player;
}


    public static void displayBoard()
{
    String row = "";
    System.out.println();

    row = " " + getSymbol(A1) + " | " + getSymbol(A2) + " | " + getSymbol(A3);
    System.out.println(row);
    System.out.println("-----------");

    row = " " + getSymbol(B1) + " | " + getSymbol(B2) + " | " + getSymbol(B3);
    System.out.println(row);
    System.out.println("-----------");

    row = " " + getSymbol(C1) + " | " + getSymbol(C2) + " | " + getSymbol(C3);
    System.out.println(row);
    System.out.println();
}

  public static String getSymbol(int square)
{
    if (square == 1)
        return "X";
    if (square == 2)
        return "O";
    return " ";
}
//This controls the Computer move . By mixing them up we make the computer more competitive
public static String getCpuMove()
{
    if (B2 == 0)
        return  "B2";

    if (A3 == 0)
        return  "A3";

    if (C2 == 0)
        return  "C2";

    if (B1 == 0)
        return  "B1";

    if (B3 == 0)
        return  "B3";

    if (C1 == 0)
        return  "C1";

    if (A1 == 0)
        return "A1";

    if (C3 == 0)
        return  "C3";
    if (A2 == 0)
        return "A2";
    return "";
}

//This contains all the possible winning combinations .
public static boolean isGameDecided()
{
    if (is3inARow(A1, A2, A3))
        return true;
    if (is3inARow(B1, B2, B3))
        return true;
    if (is3inARow(C1, C2, C3))
        return true;
    if (is3inARow(A1, B1, C1))
        return true;
    if (is3inARow(A2, B2, C2))
        return true;
    if (is3inARow(A3, B3, C3))
        return true;
    if (is3inARow(A1, B2, C3))
        return true;
    if (is3inARow(A3, B2, C1))
        return true;
    return false;
}

public static boolean is3inARow(int a, int b, int c)
{
    return ((a == b) & (a == c) & (a != 0));
}

}

【问题讨论】：

标签： java arrays string methods do-while

【解决方案1】：

看来您可以自己编写代码，所以我不打算给您代码，而只是提供一些指导。

首先不要把大部分游戏写在main方法里，放到它自己的方法里。也许将该方法称为“播放”并从主要方法中调用它。然后当 play() 完成时，在 main 方法的正下方添加一个 win() 调用。当游戏调用 win() 时，如果用户想再次玩游戏，则打印到控制台。然后添加：

if (input.equals("Y")) {
    play();
}

您不需要 else，否则程序会中断，而这正是您想要的。

您可以使用 do while 循环，但在我看来这是不必要的并且更复杂。

【讨论】：

我认为信息量恰到好处。
这实际上是我在这里提出的另一个线程，我认识到使用一个 java 文件不是正确的方法，但我正在努力将其划分为单独的类我可以从主 java 文件调用
@Arran 好吧，您可以使用单独的类文件，但即使只使用单独的方法也可以。事实上，如果你把它放在单独的类文件中很麻烦，方法就是要走的路。拥有长类文件并不可怕，尤其是当它是一个非常简单的过程时。但是，如果您想从主类中的另一个类调用方法，则该方法必须是static。你可以这样打电话：ClassName.someMethod().

【解决方案2】：

在这种情况下你只能做一个大的编辑

int main(...)
{ 
    char exit = 'N';
    do {
        //your code here        
    exit = System.in.read();
    } while(exit != 'Y');
}

【讨论】：

【解决方案3】：

import java.util.Scanner;

public class test3
{
static int A1, A2, A3, B1, B2, B3, C1, C2, C3;

static Scanner sc = new Scanner(System.in);

public static void main(String[] args)
{
    new test3().starttPlaying();

}


    String prompt = "Welcome to our X and O's game . Please take your first go: ";
    String playerMove = "";
    String cpuMove = "";
    boolean gameIsDecided = false;


    public void starttPlaying(){
    System.out.println();
    System.out.println();
    boolean playAgain = true;

        while (playAgain) {            


   for (int i = 1; i <=9; i++)
    {
        //Gives the human player its identity(1) and sets out what happens if player wins

        playerMove = getMove(prompt);
        updateBoard(playerMove, 1);
        displayBoard();
        if (isGameDecided())
        {
            System.out.println("Congratulations , you have beaten me!!");
            gameIsDecided = true;
            break;
        }

      if (i < 9)
        {
            cpuMove = getCpuMove();
            System.out.println(cpuMove);
            updateBoard(cpuMove, 2);
            displayBoard();
            if (isGameDecided())
            {
                System.out.println("Unlucky , I win. Better luck next time :");
                gameIsDecided = true;
                break;
            }
            prompt = "Take your next go: ";
            i++;
        }
    }
   if (!gameIsDecided)
      System.out.println("So nothing can separate us , the game is a draw !!");

        System.out.println("do you want to play Again Y : N"); 
       Scanner scanner = new Scanner(System.in);
       String desicion = scanner.nextLine();
       playAgain = desicion.equalsIgnoreCase("y") ? true : false;
    }
    }


//    



       public static String getMove(String prompt)
{
    String turn;
    System.out.print(prompt);
    do
    {
        turn = sc.nextLine();
        if (!isAcceptablePlay(turn))
        {
            System.out.println("Unfortunately this move isn't valid , please try again !!");
        }
    } while (!isAcceptablePlay(turn));
    return turn;
}

     public static boolean isAcceptablePlay(String turn)
{
    if (turn.equalsIgnoreCase("A1") & A1 == 0)
        return true;
    if (turn.equalsIgnoreCase("A2") & A2 == 0)
        return true;
    if (turn.equalsIgnoreCase("A3") & A3 == 0)
        return true;
    if (turn.equalsIgnoreCase("B1") & B1 == 0)
        return true;
    if (turn.equalsIgnoreCase("B2") & B2 == 0)
        return true;
    if (turn.equalsIgnoreCase("B3") & B3 == 0)
        return true;
    if (turn.equalsIgnoreCase("C1") & C1 == 0)
        return true;
    if (turn.equalsIgnoreCase("C2") & C2 == 0)
        return true;
    if (turn.equalsIgnoreCase("C3") & C3 == 0)
        return true;
    return false;
}

   public static void updateBoard(String turn, int player)
{
    if (turn.equalsIgnoreCase("A1"))
        A1 = player;
    if (turn.equalsIgnoreCase("A2"))
        A2 = player;
    if (turn.equalsIgnoreCase("A3"))
        A3 = player;
    if (turn.equalsIgnoreCase("B1"))
        B1 = player;
    if (turn.equalsIgnoreCase("B2"))
        B2 = player;
    if (turn.equalsIgnoreCase("B3"))
        B3 = player;
    if (turn.equalsIgnoreCase("C1"))
        C1 = player;
    if (turn.equalsIgnoreCase("C2"))
        C2 = player;
    if (turn.equalsIgnoreCase("C3"))
        C3 = player;
}


    public static void displayBoard()
{
    String row = "";
    System.out.println();

    row = " " + getSymbol(A1) + " | " + getSymbol(A2) + " | " + getSymbol(A3);
    System.out.println(row);
    System.out.println("-----------");

    row = " " + getSymbol(B1) + " | " + getSymbol(B2) + " | " + getSymbol(B3);
    System.out.println(row);
    System.out.println("-----------");

    row = " " + getSymbol(C1) + " | " + getSymbol(C2) + " | " + getSymbol(C3);
    System.out.println(row);
    System.out.println();
}

  public static String getSymbol(int square)
{
    if (square == 1)
        return "X";
    if (square == 2)
        return "O";
    return " ";
}
//This controls the Computer move . By mixing them up we make the computer more competitive
public static String getCpuMove()
{
    if (B2 == 0)
        return  "B2";

    if (A3 == 0)
        return  "A3";

    if (C2 == 0)
        return  "C2";

    if (B1 == 0)
        return  "B1";

    if (B3 == 0)
        return  "B3";

    if (C1 == 0)
        return  "C1";

    if (A1 == 0)
        return "A1";

    if (C3 == 0)
        return  "C3";
    if (A2 == 0)
        return "A2";
    return "";
}

//This contains all the possible winning combinations .
public static boolean isGameDecided()
{
    if (is3inARow(A1, A2, A3))
        return true;
    if (is3inARow(B1, B2, B3))
        return true;
    if (is3inARow(C1, C2, C3))
        return true;
    if (is3inARow(A1, B1, C1))
        return true;
    if (is3inARow(A2, B2, C2))
        return true;
    if (is3inARow(A3, B3, C3))
        return true;
    if (is3inARow(A1, B2, C3))
        return true;
    if (is3inARow(A3, B2, C1))
        return true;
    return false;
}

public static boolean is3inARow(int a, int b, int c)
{
    return ((a == b) & (a == c) & (a != 0));
}

}

我认为这就是你想要做的，试试我的代码，如果你愿意，可以做更多的改变

【讨论】：

这是我遇到的问题，我试过了，但完成后它不会再次重置板，所以游戏变得无法玩
告诉我怎么玩这个游戏：D
9个方框，轮流选择一个方框，X代表用户，O代表计算机。您必须连续匹配 3 次才能获胜
您需要清除static int A1, A2, A3, B1, B2, B3, C1, C2, C3; 游戏中的棋盘已更新，一旦您按“是”并重新开始游戏，棋盘未清除，我的代码没有任何问题，因为您再次询问如何玩游戏,,清除棋盘
用你的代码，游戏重新开始，只有位置仍然被填满。我将如何清除他们的位置