我为两名球员创造了一个琐事游戏。它每个询问他们5个问题，并在每个问题之后显示答案是否正确或不正确，如果不正确则显示正确答案。程序编译并运行并正确显示，直到显示正确答案，无论实际答案是什么，它总是显示3。
任何帮助将不胜感激！
import java.util.*;
import java.util.ArrayList;
public class Question
{
private ArrayList <String> questions;
private int answerNumber;
private int questionNumber;
private int [] answers = {3,2,4,3,3,4,4,1,3,3};
public Question()
{
}
public String getQuestion(int number)
{
return createQuestions(number);
}
public String toString ()
{
return "Question for player+";
}
public String createQuestions(int questionNumber)
{
ArrayList<String> questions = new ArrayList<>();
String question1 = "Who's proffesion was a chef?";
String question2 = "Who had a son named Ben?";
String question3 = "Who claimed they were on a break?";
String question4 = "Who's pick up line was \"How you doin\"?";
String question5 = "What animal is Chandler afraid of?";
String question6 = "Who married a gay ice dancer?";
String question7 = "Who did Rachel almost marry?";
String question8 = "Who had a pet monkey?";
String question9 = "Where did the show take place?";
String question10 = "What was the name of the coffee house?";
questions.add (question1);
questions.add (question2);
questions.add (question3);
questions.add (question4);
questions.add (question5);
questions.add (question6);
questions.add (question7);
questions.add (question8);
questions.add (question9);
questions.add (question10);
return questions.get(questionNumber);
}
public String getPossibleAnswers(int questionNumber)
{
ArrayList <String> possibleAnswers = new ArrayList<>();
String possibleAnswers1 = "1. Ross\n2. Rachel\n3. Monica\n4. Ross and Monica's mom";
String possibleAnswers2 = "1. Chandler\n2. Ross\n3. Rachel\n4. Phoebe";
String possibleAnswers3 = "1. Rachel\n2. Monica\n3. Joey\n4. Ross";
String possibleAnswers4 = "1. Joey\n2. Ross\n3. Chandler\n4. Phoebe";
String possibleAnswers5 = "1. Cats\n2. Snakes\n3. Dogs\n4. Monkeys";
String possibleAnswers6 = "1. Phoebe\n2. Rachel\n3. Janice\n4. Monica";
String possibleAnswers7 = "1. Ross\n2. Chandler\n3. Gunther\n4. Barry";
String possibleAnswers8 = "1. Chandler\n2. Ross\n3. Joey\n4. Phoebe";
String possibleAnswers9 = "1. Atlanta\n2. Detroit\n3. New York City\n4. Las Vegas";
String possibleAnswers10 = "1. Central Coffee\n2. Coffee Central\n3. Central Perk\n4. There was no coffee shop";
possibleAnswers.add (possibleAnswers1);
possibleAnswers.add (possibleAnswers2);
possibleAnswers.add (possibleAnswers3);
possibleAnswers.add (possibleAnswers4);
possibleAnswers.add (possibleAnswers5);
possibleAnswers.add (possibleAnswers6);
possibleAnswers.add (possibleAnswers7);
possibleAnswers.add (possibleAnswers8);
possibleAnswers.add (possibleAnswers9);
possibleAnswers.add (possibleAnswers10);
if (questionNumber == 0)
answerNumber = 0;
else if (questionNumber == 1)
answerNumber = 1;
else if (questionNumber ==2)
answerNumber = 2;
else if (questionNumber == 3)
answerNumber = 3;
else if (questionNumber == 4)
answerNumber = 4;
else if (questionNumber == 5)
answerNumber = 5;
else if (questionNumber == 6)
answerNumber = 6;
else if (questionNumber == 7)
answerNumber = 7;
else if (questionNumber == 8)
answerNumber = 8;
else answerNumber = 9;
return possibleAnswers.get(answerNumber);
}
public int getCorrectAnswer(int questionNumberAsked)
{
int answer;
if (questionNumberAsked == 1)
answer = answers[0];
else if (questionNumber == 2)
answer = answers[1];
else if (questionNumberAsked == 3)
answer = answers[2];
else if (questionNumberAsked == 4)
answer = answers[3];
else if (questionNumberAsked == 5)
answer = answers[4];
else if (questionNumberAsked == 6)
answer = answers[5];
else if (questionNumberAsked == 7)
answer = answers[6];
else if (questionNumberAsked == 8)
answer = answers[7];
else if (questionNumberAsked == 9)
answer = answers[8];
else answer = answers[9];
return answer;
}
public int getRandomQuestionNumber()
{
Random random = new Random();
int questionNumber = random.nextInt(answers.length);
return questionNumber;
}
public int displayQuestion(int playerNum)
{
int questionNumber = getRandomQuestionNumber();
// Display the player number.
System.out.println("Question for player #" + playerNum);
System.out.println("------------------------");
// Display the question.
System.out.println(getQuestion(questionNumber));
System.out.println(getPossibleAnswers(questionNumber));
return questionNumber;
}
}
import java.util.Scanner;
public class TriviaGame
{
public static void main (String [] args)
{
Scanner keyboard = new Scanner (System.in);
Question question = new Question ();
int userAnswer = 0;
int player1Points = 0;
int player2Points = 0;
for (int i = 0; i < 5; i++)
{
int questionNumber = question.displayQuestion(1);
int player1Answer = keyboard.nextInt();
if (player1Answer == question.getCorrectAnswer(questionNumber))
{
System.out.println("That is correct!");
player1Points ++;
}
else System.out.println ("Sorry the correct answer was "+question.getCorrectAnswer(questionNumber));
int questionNumberPlayer2 = question.displayQuestion(2);
int player2Answer = keyboard.nextInt();
if (player2Answer == question.getCorrectAnswer(questionNumberPlayer2))
{
System.out.println("That is correct!");
player2Points ++;
}
else System.out.println ("Sorry the correct answer was "+question.getCorrectAnswer(questionNumberPlayer2));
}
System.out.println ("Game Over!\n----------------\nPlayer 1 points: "+player1Points+"\nPlayer 2 points "+
player2Points);
if (player1Points > player2Points)
System.out.println ("Player 1 wins!");
else if (player2Points < player1Points)
System.out.println ("Player 2 wins!");
else System.out.println ("It's a tie!");
}
}
答案 0 :(得分：0)
您的getCorrectAnswer()方法根本不知道被询问的随机问题是什么！并且在同一个方法中，你有最后一个阻止设置为：
else answer = answers[9];
由于类级别的int questionNumber的默认值为0且与任何条件不匹配，因此根据最后一个else answers[9]数组，answer的值始终为3。
使其有效：
将你的getCorrectAnswer（）方法更改为，以便它知道questionNumber问的是什么..
public int getCorrectAnswer(int questionNumberAsked) {
int answer;
if (questionNumberAsked == 0)
answer = answers[0];
else if (questionNumberAsked == 1)
answer = answers[1];
else if (questionNumberAsked == 2)
answer = answers[2];
else if (questionNumberAsked == 3)
answer = answers[3];
else if (questionNumberAsked == 4)
answer = answers[4];
else if (questionNumberAsked == 5)
answer = answers[5];
else if (questionNumberAsked == 6)
answer = answers[6];
else if (questionNumberAsked == 7)
answer = answers[7];
else if (questionNumberAsked == 8)
answer = answers[8];
else if (questionNumberAsked == 9)
answer = answers[9];
else answer = 0;
return answer;
}
并在同一个类make displayQuestion方法返回生成的randomQuestionNumber，并被问为：
public int displayQuestion(int playerNum)
{
int questionNumber = getRandomQuestionNumber();
// Display the player number.
System.out.println("Question for player #" + playerNum);
System.out.println("------------------------");
// Display the question.
System.out.println(getQuestion(questionNumber));
System.out.println(getPossibleAnswers(questionNumber));
return questionNumber;
}
最后在main方法中将那个questionNumber传递给：
int questionNumber = question.displayQuestion(1);
int player1Answer = keyboard.nextInt();
if (player1Answer == question.getCorrectAnswer(questionNumber))
{
System.out.println("That is correct!");
player1Points ++;
}
else System.out.println ("Sorry the correct answer was "+question.getCorrectAnswer(questionNumber));
int questionNumberForPlayer2 = question.displayQuestion(2);
int player2Answer = keyboard.nextInt();
if (player2Answer == question.getCorrectAnswer(questionNumberForPlayer2))
{
System.out.println("That is correct!");
player2Points ++;
}
else System.out.println ("Sorry the correct answer was "+question.getCorrectAnswer(questionNumberForPlayer2));
}