JAVA学习 石头剪刀布

Java的石头剪刀布简易判断练习。

import java.util.Scanner;

public class HelloWorld {
    public static void main(String[] args){
        var scanner = new Scanner(System.in);
        System.out.print("请出招(1.石头，2.剪刀，3.布):");
        int last = scanner.nextInt();
        //首先对输入进行判断，确保输入正确。
        switch(last){
            case 1:
            case 2:
            case 3:
                var computer = (int)(Math.random()*3)+1;
                System.out.printf("电脑出招为:%d\n", computer);
                var result = last - computer;
                //对人机输入进行结果判断。
                switch (result){
                    case 0:
                        System.out.println("平局");
                        break;
                    case -1:
                    case 2:
                        System.out.println("You Win.");
                        break;
                    case -2:
                    case 1:
                        System.out.println("You Lost.");
                        break;
                }
                break;
            default:
                System.out.println("请重新出招.");
                break;
        }
    }
}