import java.util.Scanner;

/**
 * switch实现石头/剪子/布并判断胜负
 */
public class Main {

	public static void main(String[] args) {
		String[] mora = {"石头", "剪刀", "布"};
		System.out.println("请选择:");
		System.out.printf(" 1: %s\n", mora[0]);
		System.out.printf(" 2: %s\n", mora[1]);
		System.out.printf(" 3: %s\n", mora[2]);
		// 用户输入:
		Scanner scanner =new Scanner(System.in);
		int choice;
		choice = scanner.nextInt();
		if (choice > 3 || choice < 1) {
			System.out.println("请输入正确的数字。");
			return;
		}
		// 计算机随机数 1, 2, 3:
		int random = 1 + (int) Math.random() * 3;
		random = random % 3;
		System.out.printf("我出的是%s, 所以", mora[random-1]);
		switch (choice) {
		case 1:
			if (random == 1)
				System.out.println("平局！");
			else if(random == 2)
				System.out.println("你赢了！");
			else System.out.println("你输了！");
			break;
		case 2:
			if (random == 2)
				System.out.println("平局！");
			else if(random == 3)
				System.out.println("你赢了！");
			else System.out.println("你输了！");
			break;
		case 3:
			if (random == 3)
				System.out.println("平局！");
			else if(random == 1)
				System.out.println("你赢了！");
			else System.out.println("你输了！");
			break;
		default:
			break;
		}
	}

}