循环重复井字游戏

Question

我写了一个从头到尾玩井字游戏的代码。游戏结束后，我需要询问用户是否要重复游戏（yes/no），并重复直到用户输入否。我不确定在哪里或如何实现循环，因此将不胜感激。代码如下：

import java.util.Scanner;

public class bb2 {

  static char place1 = ' ';
  static char place2 = ' ';
  static char place3 = ' ';
  static char place4 = ' ';
  static char place5 = ' ';
  static char place6 = ' ';
  static char place7 = ' ';
  static char place8 = ' ';
  static char place9 = ' ';
  static Scanner input;

  public static void main(String[] args) {

    input = new Scanner(System.in);
    while (true) { // TTT 4 forever!
      printGameBoard();
      userInput();
      if (checkForWin('X')) {
        System.out.println("Congrats, you won!");
        break;
      }
      if (checkForStale()) {
        printGameBoard();
        System.out.println("Tie!");
        break;
      }
      computerTurn();
      if (checkForWin('O')) {
        System.out.println("All hail the future overlords!");
        break;
      }
      if (checkForStale()) {
        System.out.println("Tie!");
        break;
      }
    }
  }

  static void printGameBoard() {

    System.out.println(place1 + " | " + place2 + " | " + place3 + "\n---------");
    System.out.println(place4 + " | " + place5 + " | " + place6 + "\n---------");
    System.out.println(place7 + " | " + place8 + " | " + place9 + "\n");
  }

  static void userInput() {
    System.out.print("Please enter the board number:");
    int place = input.nextInt();
    // Note to self: check user input for sanity here!
    if (checkForSanity(place)) {
      placeOnBoard(place, 'X');
      System.out.println("Ok...");
      printGameBoard();
    } else {
      System.out.println("Wrong move!");
    }
  }

  static void computerTurn() {
    boolean placed = false;
    while (!placed) {
      // Randomly choose a place
      int place = (int) (1 + (Math.random() * 8));
      // Check if sane
      if (checkForSanity(place)) {
        placeOnBoard(place, 'O');
        placed = true;
      }
    }
    printGameBoard();
  }

  static boolean checkForWin(char piece) {
    if ((place1 == piece) && (place2 == piece) && (place3 == piece))
      return true;
    if ((place4 == piece) && (place5 == piece) && (place6 == piece))
      return true;
    if ((place7 == piece) && (place8 == piece) && (place9 == piece))
      return true;
    if ((place1 == piece) && (place4 == piece) && (place7 == piece))
      return true;
    if ((place2 == piece) && (place5 == piece) && (place8 == piece))
      return true;
    if ((place3 == piece) && (place6 == piece) && (place9 == piece))
      return true;
    if ((place1 == piece) && (place5 == piece) && (place9 == piece))
      return true;
    if ((place3 == piece) && (place5 == piece) && (place7 == piece))
      return true;
    return false;
  }

  static boolean checkForStale() {
    if ((place1 != ' ') && (place2 != ' ') && (place3 != ' ') 
        && (place4 != ' ') && (place5 != ' ') && (place6 != ' ')
        && (place7 != ' ') && (place8 != ' ') && (place9 != ' '))
      return true;
    return false;
  }

  static void placeOnBoard(int place, char piece) {
    if (place == 1)
      place1 = piece;
    else if (place == 2)
      place2 = piece;
    else if (place == 3)
      place3 = piece;
    else if (place == 4)
      place4 = piece;
    else if (place == 5)
      place5 = piece;
    else if (place == 6)
      place6 = piece;
    else if (place == 7)
      place7 = piece;
    else if (place == 8)
      place8 = piece;
    else if (place == 9)
      place9 = piece;
  }

  static boolean checkForSanity(int place) {
    boolean sane = false;
    if ((place == 1) && (place1 == ' '))
      sane = true;
    else if ((place == 2) && (place2 == ' '))
      sane = true;
    else if ((place == 3) && (place3 == ' '))
      sane = true;
    else if ((place == 4) && (place4 == ' '))
      sane = true;
    else if ((place == 5) && (place5 == ' '))
      sane = true;
    else if ((place == 6) && (place6 == ' '))
      sane = true;
    else if ((place == 7) && (place7 == ' '))
      sane = true;
    else if ((place == 8) && (place8 == ' '))
      sane = true;
    else if ((place == 9) && (place9 == ' '))
      sane = true;
    return sane;
  }

  static boolean checkForSanity(int row, int col) {
    return true;
  }
}

Answer 1

尝试将现有 main 方法的全部内容移动到一个新方法中，也许可以将其命名为 playOnce，然后编写一个带有循环的新 main 方法并提示用户再试一次。

Answer 2

很多地方都错了 x)

首先，如果您的 GameBoard 使用 char[] 会更好。（而不是“place1，place2，...）所以你可以使用你的"boolean checkForSanity(int row, int col)"，所有的代码都会非常漂亮

然后，你使用 "while(true)"，但不要在满员或有人获胜时重置棋盘...所以我相信你会得到无限 "All hail the future overlords!"

无论如何，我认为你的 TTT 有效，这才是主要的:) 现在你必须把你的 "while(true) {//playing}" 放在另一个 while 里，像这样：

bool replay = true;
bool gameOver = false;

while(replay) {
  while(!gameOver) { //TTT 4 Ever

    //Here your code
    if(...) {
      gameOver=true;
      //Dont forget to clear the Board here
    }

  }

  if(input.nextString().equals("Nono i dont wanna play anymore plz let me go")) {
    replay = false;
  }
  gameOver = false;
}

Answer 3

首先，我建议为所有位置选择一个字符数组，而不是单个变量。这样你就可以使用循环而不是在你的 if 语句中编写一百万个条件语句。此外，while(true) 循环将永远运行而不会清除网格。我建议制作一个方法，当 none 个地方的值或有人获胜时检查 returns 为真，并在 while 循环中实现该方法。

要回答您最初的问题，只需创建一个清除网格的方法并在您的主要函数开始时实现它，然后将整个过程放在一个 while 循环中。

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