C#实现微信红包功能

本文实例为大家分享了C#仿微信红包功能的具体代码，供大家参考，具体内容如下

Program.cs代码:

class Program
{
static void Main(string[] args)
{
//初始化要发起的红包基础数据
double total = 100;
int num = 50;
double min = 0.01;
string temp;
bool flag = false;
Console.WriteLine(string.Format("是否需要自定义红包金额和数量（默认{0}元/{1}人）Y/N：", total, num));
temp = Console.ReadLine();
if (temp.Trim().ToLower().Equals("y") || temp.Trim().ToLower().Equals("yes"))
{
Console.WriteLine("请输入你要发起的红包金额：");
do
{
temp = Console.ReadLine();
flag = double.TryParse(temp, out total);
if (!flag)
{
Console.WriteLine("金额必须为整数或小数，请重新输入：");
}
} while (!flag);
Console.WriteLine("请输入你要发起的红包个数：");
do
{
temp = Console.ReadLine();
flag = int.TryParse(temp, out num);
if (!flag)
{
Console.WriteLine("红包个数必须为整数，请重新输入：");
}
} while (!flag);
}
total -= min * num;
if (total < 0)
{
Console.WriteLine("抱歉，你的金额不足！");
return;
}
//产生正态分布的随机红包金额，并计算相关的金额和数量保证数据的准确性
double average = total / num;
double variance = 1;
Random u1 = new Random();
Random u2 = new Random();
double[] nums = new double[num];
for (int i = 0; i < num; i++)
{
double? result = total;
if (i < num - 1 && total > 0)
{
do
{
result = Round((double)Normal(u1.NextDouble(), u2.NextDouble(), average, variance), 2);
} while (result == null || result < 0);
if (total > result)
{
total = (double)Round((total - (double)result), 2);
}
else
{
result = total;
total = 0;
}
}
else if (i == num - 1)
{
total = 0;
}
nums[i] = Math.Round(min + (double)result, 2); //浮点运算问题，这里需要四舍五入数据才正确
Console.WriteLine(string.Format("第{0}个红包金额：{1}", i + 1, (min + result)));
Console.WriteLine("剩余金额：" + ((i != num - 1 && total == 0) ? min * (num - i - 1) : total + (min * (num - i - 1))));
}
Console.WriteLine("最大金额：" + nums.Max());
Console.WriteLine("最小金额：" + nums.Min());
Console.WriteLine("总额：" + Round(nums.Sum(), 2));
Console.WriteLine("初始方差：" + variance);
Console.WriteLine("结果方差：" + Variance(nums));
Console.WriteLine("按任意键退出！");
Console.ReadKey();
}
/// <summary>
/// 产生符合正态分布的随机数
/// </summary>
/// <param name="u1">正态分布第一个随机数</param>
/// <param name="u2">正态分布第二个随机数</param>
/// <param name="averageValue">正态期望(平均值)</param>
/// <param name="variance">正态标准差(Math.Sqrt(方差))</param>
/// <returns></returns>
public static double? Normal(double u1, double u2, double averageValue, double variance)
{
double? result = null;
try
{
result = averageValue + Math.Sqrt(variance) * Math.Sqrt((-2) * Math.Log(u1)) * Math.Sin(2 * Math.PI * u2);
}
catch (Exception)
{
result = null;
}
return result;
}
/// <summary>
/// 求一组数据的方差
/// </summary>
/// <param name="list">要求的数组</param>
/// <returns></returns>
public static double Variance(double[] nums)
{
double average = nums.Sum() / nums.Length;
double sum = 0;
double variance = 0;
foreach (double num in nums)
{
sum += Math.Pow((num - average), 2);
}
variance = sum / nums.Length;
return variance;
}
/// <summary>
/// 截取小数指定小数位，且不四舍五入
/// </summary>
/// <param name="originNum">要截取的小数</param>
/// <param name="lastNum">截取小数后位数</param>
/// <returns></returns>
public static double? Round(double originNum, int lastNum)
{
double? result = null;
int index = originNum.ToString().IndexOf('.');
if (index != -1)
{
string temp = originNum.ToString();
result = Convert.ToDouble(temp.Substring(0, index + 1) + temp.Substring(index + 1, Math.Min(temp.Length - index - 1, lastNum)));
}
if (result == 0)
{
result = null;
}
else if (index == -1)
{
result = originNum;
}
return result;
}
}

运行结果：

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。

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