public class Main {

public static void main(String[] args) {

System.out.println("please choice:");

System.out.println(" 1: Rock");

System.out.println(" 2: Scissors");

System.out.println(" 3: Paper");

// 用户输入:

Scanner scanner = new Scanner(System.in);

int choice = scanner.nextInt();

// 计算机随机数 1, 2, 3:

int random = 1 + (int) Math.random() * 3;

System.out.printf("random is:%d",random);

switch (choice-random) {

// TODO:

case  0:

System.out.println("平局");

break;

case  1:

System.out.println("你输了！");

case  2:

System.out.println("你赢了！");

case  -1:

System.out.println("你赢了！");

break;

case  -2:

System.out.println("你输了！");

break;

default:

break;

}

}

}