数组——7月25日

数组

//一维数组
            //int [] array = new int [5]{1,2,3,4,5};
            // int [] array = new int[5];
            // array[0] = 1;
            // array[1] = 2;
            // array[2] = 3;
            // array[3] = 4;
            // array[4] = 5;
            //// array[5] = 6;  超出索引范围

            // int a = array[2];

            //string []ss=new string [3];
            //ss[0] = "1";
            //ss[1] = "2";
            //ss[2] = "3";

            //string b = ss[2];

            //输入三个人名放入数组
            //string[] name = new string[3];
            ////Console.Write("请输入第一个人名：");
            ////name[0] = Console.ReadLine();
            ////Console.Write("请输入第二个人名：");
            ////name[1] = Console.ReadLine();
            ////Console.Write("请输入第三个人名：");
            ////name[2] = Console.ReadLine();
            //for (int i = 1; i <= 3; i++)
            //{
            //    Console.Write("请输入第{0}个人名：",i);
            //    name[i - 1] = Console.ReadLine();
            //}



            //根据班级人数创建一个数组，要求每个人的姓名都要放进去
            Console.Write("请输入班级人数：");
            int n = int.Parse(Console.ReadLine());
            string[] name = new string[n];
            for (int i = 0; i < n; i++)
            {
                Console.Write("请输入第"+(i+1)+"个人的姓名：");
                name[i] = Console.ReadLine();
            }
            Console.WriteLine("所有人的姓名已经输入完毕！");
            Console.ReadLine();

练习一：从控制台输入班级人数，将每个人的年龄放入数组，将所有人的年龄求总和

            //从控制台输入班级人数，将每个人的年龄放入数组，将所有人的年龄求总和
            Console.Write("请输入班级人数：");
            int rs = int.Parse(Console.ReadLine());
            int[] age = new int[rs];
            for (int i = 0; i < rs; i++)
            {
                Console.Write("请输入第" + (i + 1) + "个人的年龄：");
                age[i] = int.Parse(Console.ReadLine());
            }
            Console.WriteLine("所有人的年龄输入完毕，按回车键求总和！");
            Console.ReadLine();
            int sum = 0;
            for (int i = 0; i < rs; i++)
            {
                sum += age[i];
            }
            Console.WriteLine("所有人的年龄和为：" + sum);
            Console.WriteLine("所有人年龄的平均数为：" + sum / rs);

            //冒泡排序
            for (int i = 0; i < rs; i++)
            {
                for (int j = i; j < rs - 1; j++)
                {
                    if (age[i] < age[j + 1])
                    {
                        int zhong = 0;
                        age[i] = age[j + 1];
                        age[j + 1] = zhong;
                    }
                }
            }
            Console.WriteLine("从大到小的排序为：");
            Console.ReadLine();

练习二：输入班级人数，输入每个人的分数，求总分，平均分，两个最高分，两个最低分

            //输入班级人数，输入每个人的分数，求总分，平均分，两个最高分，两个最低分
            Console.Write("请输入班级人数：");
            int n = int.Parse(Console.ReadLine());
            double[] s = new double[n];
            //循环输入分数
            for (int i = 0; i < n; i++)
            {
                Console.Write("请输入第" + (i + 1) + "个人的分数：");
                s[i] = double.Parse(Console.ReadLine());
            }
            double sum = 0;
            //用循环求总分
            for (int i = 0; i < n; i++)
            {
                sum += s[i];
            }
            Console.WriteLine("总分数为：" + sum);
            Console.WriteLine("平均分数为：" + sum / n);
            //用冒泡排序，求两个最高分，两个最低分
            for (int i = 0; i < n; i++)
            {
                for (int j = i; j < n - 1; j++)
                {
                    if (s[i] < s[j + 1])
                    {
                        double zhong = 0;
                        zhong = s[i];
                        s[i] = s[j + 1];
                        s[j + 1] = zhong;
                    }
                }
            }
            Console.Write("从大到小的排序为：");
            for (int i = 0; i < n; i++)
            {
                Console.Write(s[i] + ",");
            }
            Console.WriteLine();
            Console.WriteLine("两个最大值为：" + s[0] + "," + s[1]);
            Console.WriteLine("两个最小值为：" + s[n - 1] + "," + s[n - 2]);
            Console.ReadLine();

练习三：抽奖活动，输入手机号码个数,将每个手机号码输入数组,每隔0.1秒滚动显示，5秒结束

////滚动显示
            //int[] array = new int[10];
            //Random ran = new Random();
            //for(int i=0;i<50;i++)
            //{
            //Console.Clear ();//清屏
            //    int a=ran.Next (10);
            //    Console.WriteLine(array[a]);
            //    //暂停100毫秒（即0.1秒）
            //    System.Threading.Thread.Sleep(100);
            //}
            //Console.ReadLine();



            //抽奖活动，输入手机号码个数
            //将每个手机号码输入数组
            //0.1秒滚动显示，5秒结束
            Console.Write("请输入手机号码的个数：");
            int n = int.Parse(Console.ReadLine());
            string[] shouji = new string[n];
            for (int i = 0; i < n; i++)
            {
                Console.WriteLine("请输入第" + (i + 1) + "手机号：");
                shouji[i]=Console.ReadLine();
            }
            Console.WriteLine ("搜有手机号输入完毕！请按回车键进行抽奖！");
            Console.ReadLine ();
            Random ran=new Random ();
            for (int i = 0; i < 50; i++)
            {
                Console.Clear();
                int a = ran.Next(n);
                Console.WriteLine("中奖号码为："+shouji[a]);
                System.Threading.Thread.Sleep(100);
            }
            //作弊代码
            //Console.Clear();
            //Console.WriteLine("中奖号码为：15689036363");
            Console.ReadLine();

练习四：随机输出10个不同的100以内的数，放入数组

//随机输出10个不同的100以内的数，放入数组
            int[] array=new int[10];
            Random ran=new Random ();           
            for (int i = 0; i < 10; i++)
            {
                bool b = true;
                int a = ran.Next(10);
                for (int j = 0; j < i; j++)
                {
                    if (a == array[j])
                    {
                        b = false;
                        i--;
                        j = 1000;//输入一个较大的数，让条件不满足，跳出循环
                    }
                }
                if (b == true)
                {
                    array[i] = a;
                }
            }
            for(int i=0;i<10;i++)
            {
                Console.Write(array[i]+"\t");
            }
            Console.WriteLine();
            //从小到大排序
            for (int i = 0; i < 10; i++)
            {
                for (int j = i; j < 9; j++)
                {
                    if (array[i] > array[j + 1])
                    {
                        int zhong = 0;
                        zhong = array[i];
                        array[i] = array[j + 1];
                        array[j + 1] = zhong;
                    }
                }
            }
            for(int i=0;i<10;i++)
            {
                Console.Write(array[i]+"\t");
            }
            Console.ReadLine();

 练习五：用数组做四位数验证码

//随机生成4位数的验证码，
            //比照输入验证码，看是否正确
            Random ran = new Random();
            string[] y = new string[62] { "A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z","a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z","0","1","2","3","4","5","6","7","8","9" };
            string aa = "";
            string bb = "";
            for (int i = 0; i < 4; i++)
            {
                int a = ran.Next(62);
                aa = y[a];
                bb += aa;
            }
            Console.WriteLine("验证码为："+bb);
            Console.Write("请输入验证码：");
            string m = Console.ReadLine();
            string m1 = bb.ToUpper();
            string m2 = m.ToUpper();
            if (m1 == m2)
            {
                Console.WriteLine("您输入的验证码正确！");
            }
            else
            {
                Console.WriteLine("您输入的验证码有误！");
            }
            Console.ReadLine ();