package operator;
//不用第三个辅助变量，实现两个数的交换
public class Demo08 {
    public static void change(int a, int b){
        a = a+b;
        b = a-b;
        a = a-b;
        System.out.println(a);
        System.out.println(b);
    }
    public static void main(String[] args) {
        change(900,3000);
    }
}

后续可能会补充别的算法。