Question

我正试图在学校制作一个nim游戏，不幸的是我得到了与我想要的输出不同的输出;这是我的代码。

import java.util.Random;
import java.util.Scanner;

public class Nim2 {
    private static int numStonesLeft;

        /**
         */
     /**
      * The computerTurn method chooses a random number from 1 to 3 if
      * numStonesLeft is greater than or equal to 3, otherwise chooses a random
      * number from 1 to numStonesLeft.
      * 
      * Then decrements numStonesLeft appropriately and prints the turn.
      */
     public static void computerTurn() {
         int stonesChosen = (int) (Math.random() * 16) + 15;

         numStonesLeft -= stonesChosen;
         System.out.println("\nI took " + stonesChosen + " stones.");
         System.out.println("There are " + numStonesLeft + " stones left.");
     }

     /**
      * The playerTurn method prompts the user for a valid number of stones to
      * choose and reads an int value from the user and will repeat this action
      * while the user input is invalid. (i.e. user must choose 1, 2 or 3 AND
      * their choice must be less than or equal to numStonesLeft.)
      * 
      * Also decrements numStonesLeft appropriately and prints the turn.
      */
     public static void playerTurn() {
         Scanner input = new Scanner(System.in);
         System.out.println("Number of stones you take this turn:");
         int stonesChosen = 0;
         stonesChosen = input.nextInt();

         while (stonesChosen > 3 || stonesChosen < 1) {
             ;
             System.out.println("That is an invalid number of stones.");
             stonesChosen = input.nextInt();
         }

         if (stonesChosen <= 3 || stonesChosen >= 1)
             ;
         {
             System.out.println("\nYou took " + stonesChosen + " stones.");
             System.out.println("There are " + (numStonesLeft - stonesChosen)
                     + " stones left.");
         }
         stonesChosen = input.nextInt();

     }

     public void gameEnded() {          
            boolean over = false;


            }
     }

不同的客户代码

public class TestNim2 {

    public static void main(String[] args) {

        Nim2 nim = new Nim2();
         int numStonesLeft = (int) (Math.random() * 16) + 15;
        System.out.println("This is the Game of nim.");
        System.out.println("There is a pile of " + numStonesLeft
                + " stones between us.");
        System.out.println("We alternate taking either 1,2 or 3 stones.");
        System.out.println("The person who takes the last stone loses");

        // Write a loop to alternate computerTurn() and playerTurn()
        // checking after each turn see if there is a winner to print
        // and to break the loop ... then output the winner


            nim.playerTurn();
            nim.computerTurn();
        }
}

我得到的输出是

本回合你采取的石头数量：2
     你拿了2块石头。剩下-2石头。 3
     我拿了16块石头。剩下-16块石头。

我想要的输出应该与此类似

你拿了2块石头。剩下18颗宝石//随机数为20

我拿了3块石头剩下15块石头

Answer 1

有很多问题：

您没有初始化numStonesLeft。
你在玩家回合中忘了numStonesLeft -= stonesChosen;。
扣除后不检查numStonesLeft >= 0。
在if之后放置分号可能会以无条件执行以下范围的方式进行解析。停止在行的开头放置随机分号。
玩家回合中多余stonesChosen = input.nextInt();。

Nim逻辑错误的游戏

1 个答案: