Random r = new Random();
int bossHealth = 20;
int bossDefense = 10;
int round = 1;
try
{
    Console.WriteLine("游戏开始");
    while (true) 
    {
        int attack = r.Next(8, 13);
        Console.WriteLine("当前第{0}回合",round);
        if (attack >= bossDefense)
        {
            bossHealth -= attack - bossDefense;
            Console.WriteLine("你攻击了BOSS，造成了" + attack + "点伤害\n" + "BOSS剩余血量：" + bossHealth);
        }else
        {
            Console.WriteLine("你的攻击被BOSS防御住了，造成了0点伤害");
        }
        round++;
        if (bossHealth <= 0)
        {
            Console.WriteLine("你打赢了BOSS，共使用了{0}回合",round-1);
            break;
        }
    }
}catch (Exception ex)
{
    Console.WriteLine("错误代码: " + ex.Message);
}
finally
{
    Console.WriteLine("游戏结束");
}