Question

基本上，我正在制作Nim游戏，并且在游戏的前2个序列之后代码停止循环。首先是玩家取出石头，然后是计算机取出石头。我正在尝试使其始终重复循环，直到结石达到0。为了解决此问题，我需要在哪里更改while语句？

import java.util.Scanner;
import java.lang.Math;

public class Nim {

    public static int validEntry2(int comp) {
        int cm = 1;
        int newStones = 1;
        while (cm == 1) {
            comp = drawStones(comp);
            if ( comp < 1 || comp > 3 || comp < newStones) {
                System.out.println("Invalid parameters. Please enter something between 1-3.");
            } else
                System.out.println("Computer picks " + comp + " stones");
                cm = 2;
        }
        return comp;
    }

    public static int validEntry(int player) {
        int pl = 1;
        int newStones = 1;
        while (pl == 1) {
            player = playerStones(player);
            if (player < 1 || player > 3 || player < newStones) {
                System.out.println("Invalid parameters. Please enter something between 1-3.");
            } else
                pl = 2;
        }
        return player;
    }

    public static int drawStones(int comp) {
        comp = (int)(3 * Math.random() + 1);
        return comp;
    }

    public static int playerStones(int player) {
        Scanner input = new Scanner(System.in);
        System.out.println("How many stones do you want to take?");
        player = input.nextInt();
        return player;
    }


    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);
        int stones;
        stones = (int)(16 * Math.random() + 15);
        int newStones = stones;
        int player = 1;
        int comp = 1;
        int pl = 1;
        // Display how many stones there are.
        System.out.println("There are currently " + stones + " stones left");
        //Players turn
        while (pl == 1) {
            player = validEntry(player);
            if ( (newStones - player) < 0 ) {
                System.out.println("Invalid input.");
            } else {
                pl = 2;
                newStones -= player;
            }
                // Does the player lose?
            if (newStones == 0) {
                System.out.println("You just lost to a computer.");
            } else {
                System.out.println("There are " + newStones + " stones left");
            }
            // Computer Turn
            int cm = 1;
            while (cm == 1) {
                comp = validEntry2(comp);
                if ( (newStones - comp) < 0) {
                    System.out.println("Invalid Input.");
                } else {
                    cm = 2;
                    newStones -= comp;
                }
                // Does Computer Lose?
                if (newStones == 0) {
                    System.out.println("You just beat the computer!");
                } else {
                    System.out.println("There are " + newStones + " stones left");
                }
            }
        }
    }

}

Answer 1

您的第一个if's else子句没有{}，因此总是执行cm = 2并立即中断while循环。

由于代码的这一部分已缩进，我强烈怀疑这不是您的意图吗？

编辑：只要pl设置为1，您的主函数就会运行while循环。一旦pl设置为2，该循环就会退出并因此终止程序。因此，您可能想考虑此循环的退出条件。

总的来说，我需要改进一些方面，以使调试代码更加容易。例如，与其在主函数中嵌套两个while循环，不如将它们依次执行（理想情况下是在单独的函数中执行，因此您的代码会变得更整洁）。然后，您可以在两个回合上进行循环，直到没有剩余的石头了。

如何为Nim游戏制作此循环？

1 个答案: