口算题卡代码

8. (简答题) 请完善课上的口算题卡代码，实现重复题目的检测、题目数字范围、加减乘除算式的参数化等扩展功能，提交代码和运行截图。

package org.example;

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

public class Main {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("请输入题目的最小数字范围：");
        int minRange = scanner.nextInt();

        System.out.print("请输入题目的最大数字范围：");
        int maxRange = scanner.nextInt();

        System.out.print("请输入生成题目的数量：");
        int numberOfQuestions = scanner.nextInt();

        System.out.print("请选择算式类型（1: 加法, 2: 减法, 3: 乘法, 4: 除法）：");
        int operatorChoice = scanner.nextInt();

        System.out.print("请输入每个算式中的操作数数量：");
        int operandCount = scanner.nextInt();

        scanner.close();

        printArithmeticQuestions(minRange, maxRange, numberOfQuestions, operatorChoice, operandCount);
    }

    public static void printArithmeticQuestions(int minRange, int maxRange, int numberOfQuestions, int operatorChoice, int operandCount) {
        System.out.println("生成的口算题目如下：\n");

        Random random = new Random();
        int questionsPerLine = 5; // 每行显示的题目数量

        for (int i = 1; i <= numberOfQuestions; i++) {
            String question = generateRandomQuestion(minRange, maxRange, operatorChoice, operandCount);

            System.out.printf(question + "\t");

            // 每行显示指定数量的题目后，换行
            if (i % questionsPerLine == 0) {
                System.out.println(); // 换行
            }
        }
    }

    public static String generateRandomQuestion(int minRange, int maxRange, int operatorChoice, int operandCount) {
        Random random = new Random();
        StringBuilder question = new StringBuilder();

        for (int i = 0; i < operandCount; i++) {
            int operand = random.nextInt(maxRange - minRange + 1) + minRange;
            question.append(operand);

            if (i < operandCount - 1) {
                question.append(" ");
                question.append(getOperatorSymbol(operatorChoice));
                question.append(" ");
            }
        }

        question.append(" = ");
        return question.toString();
    }

    public static String getOperatorSymbol(int operatorChoice) {
        switch (operatorChoice) {
            case 1:
                return "+";
            case 2:
                return "-";
            case 3:
                return "×";
            case 4:
                return "÷";
            default:
                return "";
        }
    }
}

运行结果示意图：