如何编写Java方法统计问答游戏中的正确答题数？

原代码存在的核心问题 #

• 方法不能嵌套定义（guess和correct方法不能放在main方法内部）
• 重复声明input变量，且提前读取输入的逻辑错误
• guess方法的循环逻辑混乱，重复调用nextLine()导致多读取用户输入，且未返回答题结果用于统计
• 缺少正确答题数的统计逻辑实现

修正后的完整代码 #

import java.util.Scanner;

public class AnimalTriviaGame {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int correctCount = 0;

        // 游戏介绍
        System.out.println("Welcome to the Animal Answers Trivia Game!");
        System.out.println("You will be answering questions about various animals and " +
                "tested on your knowledge of furry critters to slimy snakes.");

        // 逐个提问并统计正确数
        if (askQuestion("What types of animal(s) can't vomit?", "Rodents", scan)) {
            correctCount++;
        }
        if (askQuestion("What is the only mammal capable of flight?", "Bats", scan)) {
            correctCount++;
        }
        if (askQuestion("What mammal has the most powerful bite?", "Hippos", scan)) {
            correctCount++;
        }
        if (askQuestion("Where is the only place that dogs have sweat glands?", "paws", scan)) {
            correctCount++;
        }
        if (askQuestion("What is a male duck called?", "drake", scan)) {
            correctCount++;
        }

        // 输出最终统计结果
        System.out.println("\nGame Over!");
        System.out.println("You got " + correctCount + " out of 5 questions correct.");
        scan.close();
    }

    // 处理单个问题的答题逻辑，返回是否答对
    private static boolean askQuestion(String question, String correctAnswer, Scanner scanner) {
        System.out.println("\n" + question);
        // 给用户2次答题机会
        for (int attempt = 1; attempt <= 2; attempt++) {
            String userInput = scanner.nextLine().trim();
            if (userInput.equalsIgnoreCase(correctAnswer)) {
                System.out.println("Good job, you got the correct answer!");
                return true; // 答对直接返回true，结束当前问题
            } else {
                if (attempt == 1) {
                    System.out.println("Try again!");
                } else {
                    System.out.println("Sorry! Answer is incorrect. The correct answer is: " + correctAnswer);
                }
            }
        }
        return false; // 两次都答错返回false
    }
}

关键逻辑说明 #

• 方法封装：把单个问题的答题逻辑封装到askQuestion方法中，参数包含问题文本、正确答案和Scanner，返回布尔值表示是否答对，便于统计正确数。
• 答题循环：用for循环控制2次答题机会，第一次答错提示重试，第二次答错直接给出正确答案。
• 统计逻辑：在main方法中初始化计数器correctCount，每调用一次askQuestion就根据返回值更新计数器，最后输出统计结果。
• 输入处理：用trim()去除用户输入的首尾空格，equalsIgnoreCase()忽略大小写判断，提升用户体验。

内容的提问来源于stack exchange，提问作者jiayou