ASP.NET implementation of WeChat red envelope grabbing code example

Everyone in the group is playing the game of grabbing red envelopes, grabbing them and sending them out, sending them out and grabbing them again. It is simply boring. Programmers are interested in how to implement it. Here is a brief introduction to the implementation ideas, and a dome is attached. The code is a bit low, fortunately, it has been realized. The specific content is as follows

Text

100 blocks will send 30 pieces Red envelope

　

##13 red envelopes for 50 yuan

　

10 red envelopes per block

The following conditions need to be met to issue red envelopes

1. The total amount remains unchanged

2. Each Each red envelope must have money
3. Try to be as even as possible, otherwise it will be meaningless to grab red envelopes

Implementation ideas
1. First of all, we must determine the smallest unit. Here it is accurate to minutes. I use int type for calculation here, and the results are all int type. 2. The data is uniform, here it is 13. Remainder processing, when the data gives an average of 20 red envelopes, there must be a deviation from the total amount. At this time, we have to refund more and make up less. If it is greater than the total amount, let the red envelope The one with the larger amount will reduce it (total amount/total number of people). If there is still something left, let the one with the second largest amount reduce it until the vacancy is filled, and vice versa.
4. Shuffle the order and garden carefully. Friends may find that red envelopes are in order, and we must simply write a function to disrupt it.

demo

/// <summary>
 /// 抢红包
 /// </summary>
 /// <param name="money"></param>
 /// <param name="num"></param>
 /// <returns></returns>
 public List<int> qhb(int money, int num)
 {
  int min = 1;
  int pjs = money / num;
  List<int> list = new List<int>();
  Random rnd = new Random();
  for (int i = 0; i < num; i++)
  {
  int max = (money / (num - i)) * 2;
  int s = rnd.Next(min, max);
  s = checkmoney(s, min, max);
  list.Add(s);
  money -= s;
  }
  //前面数据都是合理的,结尾必须多退少补
  list = checklist(money, pjs, list);
  return list;
 }

/// <summary>
 /// 余数处理
 /// </summary>
 /// <param name="money"></param>
 /// <param name="list"></param>
 /// <returns></returns>
 public List<int> checklist(int money, int pjs, List<int> list)
 {
  if (money != 0)
  {
  if (money > 0)
  {

   List<int> list_order = maopao(list);
   //给最小
   if (money / pjs == 0)
   {   
   list_order[0] += money;
   }
   else
   {
   for (int i = 0; i < money / pjs + 1; i++)
   {
    if (i == money / pjs)
    {
    list_order[i] += (money - (money / pjs) * pjs);
    }
    else
    {
    list_order[i] += pjs;
    }

   }
   }
   return list_order;
  }
  else
  {

   List<int> list_order = maopao(list,"desc");
   //给最大
   if (money / pjs == 0)
   {

   list_order[0] += money;
   }
   else
   {
   for (int i = 0; i < -(money / pjs) + 1; i++)
   {
    if (i == -(money / pjs))
    {
    list_order[i] += (money - (money / pjs) * pjs);
    }
    else
    {
    list_order[i] -= pjs;
    }

   }
   }
   return list_order;
  }
  }
  return list;
 }

 /// <summary>
  /// 冒泡排序
  /// </summary>
  /// <param name="list"></param>
  /// <param name="order"></param>
  /// <returns></returns>
  public List<int> maopao(List<int> list,string order = "asc")
  {
  if (order != "asc")
  {
   for (int i = 0; i < list.Count; i++)
   {
   for (int j = 0; j < list.Count - i - 1; j++)
   {
    if (list[j + 1] > list[j])
   {
    int temp = list[j];
    list[j] = list[j + 1];
    list[j + 1] = temp;
 
    }
   }
   }
  }
  else 
  {
   for (int i = 0; i < list.Count; i++)
   {
   for (int j = 0; j < list.Count-i-1;j++)
   {
    if (list[j+1] < list[j])
    {
    int temp = list[j];
    list[j] = list[j+1];
    list[j+1] = temp;

   }
   }
  }
  }
  return list;
 }

/// <summary>
 /// 打乱顺序
  /// </summary>
  /// <param name="list"></param>
  /// <returns></returns>
 public List<int> suiji(List<int> list) 
  {
  Random rnd = new Random();
  for (int i = 0; i < list.Count; i++)
  {
   int temp = list[i];
   int j = rnd.Next(0, list.Count-1);
   list[i] = list[j];
   list[j] = temp;
  }
  return list;
 }

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