正文

C#实现微信红包功能

︶ㄣSDDLL学院 メ
SDDLL学院V管理员 / 阅读
0708
这篇文章主要介绍了C#实现微信红包功能，使用正态分布计算红包金额，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

这篇文章主要介绍了C#实现微信红包功能，使用正态分布计算红包金额，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下

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:

?
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
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：

C#实现微信红包功能

C#实现微信红包功能

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米米素材网。