java 随机产生计算题_Java编写一个随机产生小学生四则运算题30道

好的，下面是 Java 代码实现：

import java.util.Random;

public class MathQuiz {
    public static void main(String[] args) {
        Random random = new Random();
        int count = 30; // 题目数量
        int range = 100; // 随机数范围
        String[] operators = {"+", "-", "*", "/"}; // 运算符

        for (int i = 0; i < count; i++) {
            int a = random.nextInt(range) + 1;
            int b = random.nextInt(range) + 1;
            String operator = operators[random.nextInt(4)];
            int result = 0;

            switch (operator) {
                case "+":
                    result = a + b;
                    break;
                case "-":
                    result = a - b;
                    break;
                case "*":
                    result = a * b;
                    break;
                case "/":
                    result = a / b;
                    break;
            }

            System.out.println((i + 1) + ". " + a + " " + operator + " " + b + " = " + result);
        }
    }
}

以上代码会生成 30 道小学生四则运算题，每道题目中的数字在 1 到 100 之间随机生成，运算符为加、减、乘、除（概率相等）。