java代码 自动生成100道10以内随机加减法

可以使用以下代码实现：

import java.util.Random;

public class Main {
public static void main(String[] args) {
Random random = new Random();
for (int i = ; i < 100; i++) {
int a = random.nextInt(10) + 1;
int b = random.nextInt(10) + 1;
int operator = random.nextInt(2);
if (operator == ) {
System.out.println(a + " + " + b + " = ");
} else {
System.out.println(a + " - " + b + " = ");
}
}
}
}