public class RedPacketsInfo
{
/// <summary>
/// 最大消費(fèi)金額
/// </summary>
public int MaxAmount { get; set; }
/// <summary>
 /// 最小消費(fèi)金額
  /// </summary>
  public int MinAmount { get; set; }
  /// <summary>
  /// 紅包金額
  /// </summary>
  public int TotalAmount { get; set; }
  /// <summary>
  /// 紅包可被分割的數(shù)量
  /// </summary>
  public int RedPacketQuantity { get; set; }
}

private static List<RedPacketsInfo> GetRedPackets()
{
  return new List<RedPacketsInfo>()
  {
    new RedPacketsInfo
    {
      MinAmount = 1000,
      MaxAmount = 2000,
      RedPacketQuantity = 5,
      TotalAmount=1000
    },
    new RedPacketsInfo
    {
      MinAmount = 2000,
      MaxAmount = 3000,
      RedPacketQuantity = 5,
      TotalAmount=1000
    },
    new RedPacketsInfo
    {
      MinAmount = 4000,
      MaxAmount = 6000,
      RedPacketQuantity = 5,
      TotalAmount=1000
    },
    new RedPacketsInfo
    {
      MinAmount = 6000,
      MaxAmount = 8000,
      RedPacketQuantity = 5,
      TotalAmount=1000
    },
    new RedPacketsInfo
    {
      MinAmount = 10000,
      MaxAmount = int.MaxValue,
      RedPacketQuantity = 5,
      TotalAmount=1000
    }
  };
}

public class SharedRedPacket
{
  /// <summary>
  /// 分享人UserId
  /// </summary>
  public int SenderUserId { get; set; }
  /// <summary>
  /// 分享時(shí)間
  /// </summary>
  public DateTime SendTime { get; set; }
  public List<RobbedRedPacket> RobbedRedPackets { get; set; }
}
public class RobbedRedPacket
{
  /// <summary>
  /// 搶到紅包的人的UserId
  /// </summary>
  public int UserId { get; set; }
  /// <summary>
  /// 搶到的紅包金額
  /// </summary>
  public int Amount { get; set; }
  /// <summary>
  /// 搶到時(shí)間
  /// </summary>
  public DateTime RobbedTime { get; set; }
}

//紅包隨機(jī)拆分
Random ran = new Random();
List<double> randoms = new List<double>(redPacketsList.Count);
for (int i = 0; i < redPacketsInfo.RedPacketQuantity - 1; i++)
{
  int max = (totalAmount - (redPacketsInfo.RedPacketQuantity - i)) * 1;
  int result = ran.Next(1, max);
  randoms.Add(result);
  totalAmount -= result;
}
randoms.Add(totalAmount);

//正太分布處理
for (int i = 0; i < redPacketsInfo.RedPacketQuantity; i++)
{
  double a = Math.Sqrt(Math.Abs(2 * Math.Log(randoms[i], Math.E)));
  double b = Math.Cos(2 * Math.PI * randoms[i]);
  randoms[i] = a * b * 0.3 + 1;
}

//生成最終的紅包數(shù)據(jù)
double d = originalTotal / randoms.Sum();
SharedRedPacket sharedRedPacket = new SharedRedPacket();
sharedRedPacket.RobbedRedPackets = new List<RobbedRedPacket>(redPacketsList.Count);
for (int i = 0; i < redPacketsInfo.RedPacketQuantity - 1; i++)
{
  sharedRedPacket.RobbedRedPackets.Add(new RobbedRedPacket
  {
    Amount = (int)Math.Round(randoms[i] * d, 0)
  });
}
sharedRedPacket.RobbedRedPackets.Add(new RobbedRedPacket
{
  Amount = originalTotal - sharedRedPacket.RobbedRedPackets.Sum(p => p.Amount)
});

Console.WriteLine("是否分享輸入Y分享成功，輸入N退出");
 string result = Console.ReadLine();
 if (result == "Y")
 {
   var leftRedPacket = sharedRedPacket.RobbedRedPackets.Where(p => p.UserId <= 0).ToList();
   var robbedRedPacket = leftRedPacket[new Random().Next(1, leftRedPacket.Count + 1)];
   Console.WriteLine("搶到的到紅包金額是：" + robbedRedPacket.Amount);
   Console.WriteLine("-------------------------------------------------------");
 }