今日总结10.14

尝试将生成的算式及习题长期保存下来，建议采用CSV形式存储。提交实现效果截图及相关代码。

import java.io.FileWriter;
import java.io.IOException;
import java.util.Random;
import java.util.Scanner;

public class MathOperate_File{

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("请输入要生成题目数量：");

        int numberOfQuestions = scanner.nextInt(); // 指定生成题目的数量
        generateMathQuestions(numberOfQuestions);
    }

    public static void generateMathQuestions(int numQuestions) {
        Random random = new Random();

        try {
            FileWriter writer = new FileWriter("math_questions.csv");

            for (int i = 0; i < numQuestions; i++) {
                int operand1 = random.nextInt(100); // 随机生成第一个操作数（0-99之间的整数）
                int operand2 = random.nextInt(100); // 随机生成第二个操作数（0-99之间的整数）
                int operator = random.nextInt(2); // 随机选择运算符：0代表加法，1代表减法

                String operatorSymbol;
                int answer;

                if (operator == 0) {
                    operatorSymbol = "+";
                    answer = operand1 + operand2;
                } else {
                    operatorSymbol = "-";
                    answer = operand1 - operand2;
                }

                String question = operand1 + " " + operatorSymbol + " " + operand2;
                String csvLine = question + "," + answer; // 以CSV格式拼接问题和答案

                writer.write(csvLine + "\n"); // 写入CSV文件
                System.out.println(question);
            }

            writer.close(); // 关闭文件写入

        } catch (IOException e) {
            System.err.println("无法创建CSV文件或写入数据：" + e.getMessage());
        }
    }
}