package com.company; import java.util.Random; import java.util.Scanner; public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); Random random = new Random(); int score = 0; for (int i = 1; i <= 10; i++) { int num1 = random.nextInt(100); int num2 = random.nextInt(100); int operator = random.nextInt(2); // 0表示加法，1表示减法 int result; if (operator == 0) { result = num1 + num2; } else { result = num1 - num2; } System.out.print(i + ". " + num1 + (operator == 0 ? " + " : " - ") + num2 + " = "); int answer = scanner.nextInt(); if (answer == result) { System.out.println("恭喜你，答对了！"); score++; } else { System.out.println("很遗憾，答错了。正确答案为：" + result); } } System.out.println("您的得分为：" + score * 10); } }

由于题目代码缺少运算符号，所以无法运行。在result的计算中，应该是num1+num2，而不是num1-num2。

修改后代码如下：

package com.company;
import java.util.Random;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Random random = new Random();
        int score = 0;
        for (int i = 1; i <= 10; i++) {
            int num1 = random.nextInt(100);
            int num2 = random.nextInt(100);
            int operator = random.nextInt(2);
            // 0表示加法，1表示减法
            int result;
            if (operator == 0) {
                result = num1 + num2;
            } else {
                result = num1 - num2;
            }
            System.out.print(i + ". " + num1 + (operator == 0 ? " + " : " - ") + num2 + " = ");
            int answer = scanner.nextInt();
            if (answer == result)
            {
                System.out.println("恭喜你，答对了！");
                score ++;
            }
            else {
                System.out.println("很遗憾，答错了。正确答案为：" + result);
            }
        }
        System.out.println("您的得分为：" + score * 10);
    }
}