例题：石头剪子布。用数组做。比较难理解，主要是逻辑思维

             Random r = new Random(); //随机定义两个人

             string[] s1 = new string[] { "剪刀", "石头", "布" };

            string[] s2 = new string[] { "剪刀", "石头", "布" }; //随机定义两个人的数组

            string jg;

            while (true)

            {

                int sj1 = r.Next(0, 3);  //0代表剪刀，1代表石头，2代表布

                int sj2 = r.Next(0, 3);

                if (sj1 == sj2)

                {

                    jg = "A出的是" + s1[sj1] + ",B出的是" + s2[sj2] + ",结果是平局";

                }

                else if (sj1 > sj2)

                {

                    if (sj1 == 0 && sj2 == 2) //如果随机1出剪刀，随机2出布

                    {

                        jg = "A出的是" + s1[sj1] + ",B出的是" + s2[sj2] + "，结果是B胜利";

                    }

                    else

                    {

                        jg = "A出的是" + s1[sj1] + ",B出的是" + s2[sj2] + "结果是A胜利";

                    }

                }

                else

                {

                    if (sj1 == 2 && sj2 == 0) //如果随机1出布，随机2出剪刀

                    {

                        jg = "A出的是" + s1[sj1] + ",B出的是" + s2[sj2] + "，结果是B胜利";

                    }

                    else

                    {  

                       jg = "A出的是" + s1[sj1] + ",B出的是" + s2[sj2] + "，结果是B胜利";

                    }

                }

                Console.WriteLine(jg);

                Console.ReadLine();