代碼

namespace 訓(xùn)練三
{
class Program
{
static void Main(string[] args)
{
try
{
string num;
do
{
Console.WriteLine("******歡迎進(jìn)入獎(jiǎng)客富翁系統(tǒng)********");
Console.WriteLine("\t 1.注冊(cè)");
Console.WriteLine("\t 2.登入");
Console.WriteLine("\t 3.抽獎(jiǎng)");
Console.WriteLine("******************************");
Console.Write("請(qǐng)選擇菜單：");
int sum = Convert.ToInt32(Console.ReadLine());
if (sum == 1)
{
Console.WriteLine("獎(jiǎng)客富翁系統(tǒng)----注冊(cè)");
Console.WriteLine("請(qǐng)?zhí)钊肽愕膫€(gè)人注冊(cè)信息");
Console.Write("用戶名：");
string name = Console.ReadLine();
Console.Write("密碼：");
string mima = Console.ReadLine();
Console.WriteLine("注冊(cè)成功梭灿，請(qǐng)記好您的會(huì)員卡號(hào)");
int max = 99999999;
int min = 10000000;
Random rd = new Random();
int shu=rd.Next(min, max);

                    Console.WriteLine("用戶名\t密碼\t會(huì)員卡號(hào)");
                    Console.WriteLine("{0}\t{1}\t{2}",name,mima,shu);

                }
                else if (sum == 2)
                {
                    Console.WriteLine("獎(jiǎng)客富翁系統(tǒng)----登入");
                    Console.Write("請(qǐng)輸入用戶名：");
                    string Name = Console.ReadLine();
                    Console.Write("請(qǐng)輸入密碼：");
                    string Mima = Console.ReadLine();
                    Console.WriteLine();
                    Console.WriteLine("歡迎你{0}",Name);
                }
                else if (sum == 3)
                {
                    Console.WriteLine("獎(jiǎng)客富翁系統(tǒng)----抽獎(jiǎng)");
                    Console.Write("請(qǐng)輸入你的會(huì)員卡號(hào):");
                    int shu = Convert.ToInt32(Console.ReadLine());
                    int max = 99999999;
                    int min = 10000000;
                    Random rd = new Random();
                    int yi = rd.Next(min, max);
                    int er = rd.Next(min, max);
                    int san = rd.Next(min, max);
                    int si = rd.Next(min, max);
                    int wu = rd.Next(min, max);
                    Console.WriteLine("{0}\t{1}\t{2}\t{3}\t{4}", yi, er, san, si, wu);
                    if (shu == yi) 
                    {
                        Console.Write("您是本次的幸運(yùn)會(huì)員");
                    }
                    else if (shu == er)         
                    {
                        Console.Write("您是本次的幸運(yùn)會(huì)員");
                    }
                    else if (shu == san) 
                    {
                        Console.Write("您是本次的幸運(yùn)會(huì)員");

                    }
                    else if (shu == si) 
                    {
                        Console.Write("您是本次的幸運(yùn)會(huì)員");
                    }
                    else if (shu == wu)
                    {
                        Console.Write("您是本次的幸運(yùn)會(huì)員");
                    }
                    else 
                    {
                        Console.Write("抱歉询张，您不是本次的幸運(yùn)會(huì)員");
                    }
                }
                else
                {
                    Console.Write("你的輸入有誤");
                }
                Console.Write("是否繼續(xù)(y/n):");
                num = Console.ReadLine();
                if (num == "n")
                {
                    Console.Write("程序退出，謝謝使用");
                }
            }
            while (num == "y");
        }
        catch
        {
            Console.Write("您的輸入有誤");
        }
    }
}

}