入门级 Java输入两位数，比较大小

	Scanner input = new Scanner(System.in);
	System.out.println("请输入两个角色的数字");
	int a = input.nextInt();
	int b = input.nextInt();
	if (a == b ) {
		System.out.println("平局");
	} else if((a == 0 && b ==2) || (a ==1 && b==0) || (a == 2 && b==1)){
		System.out.println("b胜");
	}else if(a>3 || b>3){
		System.out.println("输入错误");
	}else {
		System.out.println("a胜");
	}