if语句之猜拳

 Console.WriteLine("请出拳：");
            string human = Console.ReadLine();

            Random rand = new Random(); //造一个随机数生成器
            int n = rand.Next(3); //随机生成一个小于3的整数

            string computer;
            int ren;

            if (n == 0)
            {
                computer = "剪刀";
            }
            else if (n == 1)
            {
                computer = "石头";
            }
            else
            {
                computer = "布";
            }

            if (human == "剪刀" || human == "石头" || human == "布")//对人出的拳进行定义，设定0，1,2与电脑生成的进行对比
            {
                if (human == "剪刀")
                {
                    ren = 0;
                }
                else if (human == "石头")
                {
                    ren = 1;
                }
                else
                {
                    ren = 2;
                }


                Console.WriteLine(human + " VS " + computer);

                int jieguo = ren - n;
                if (jieguo == 1 || jieguo == -2)
                {
                    Console.WriteLine("大哥，你赢了！");
                }
                else if (jieguo == 0)
                {
                    Console.WriteLine("平局！");
                }
                else
                {
                    Console.WriteLine("你太菜了！");
                }

            }
            else
            {
                Console.WriteLine("滚犊子！");
            }