JAVA4 题解 | 交换变量值

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a = scanner.nextInt();
        int b = scanner.nextInt();

        //write your code here.......
        // a = a + b ，此时a是a+b的和
        a += b;
        // 此时b是和-b，就是a的值
        b = a - b;
        // a是和-a的值，就是b的值
        a = a - b;
        System.out.println(a+" "+b);
    }
}