猜拳（三局两胜）

int renying = 0;int dnying = 0;for (int i = 1; i <= 3; i++){Random r = new Random();//生成随机数int diannao = r.Next(3);//生成0-3之间，不包括3的数Console.Write("请出拳：剪刀-0 石头-1 布-2 ：");int ren = int.Parse(Console.ReadLine());//控制台录入字符串，转换为int类型Console.WriteLine("电脑出拳：{0}", diannao);if (diannao - ren == -1 || ren - diannao == -2)//所有人赢的情况{renying++;Console.WriteLine("恭喜你，你赢了");}else if (diannao == ren){Console.WriteLine("平局");}else{dnying++;Console.WriteLine("输了");}}if (renying >= 2){Console.WriteLine("三局两胜人赢了");}if (dnying >= 2){Console.WriteLine("三局两胜电脑赢了");}