研究了下红包算法

//根据当前数组获取随机数
    public int GetRanDouble(Random ran,int incount,int inmoney,ref int minmoney,ref int maxmoney,ref List<int> outarray,int summoney)
    {
        int nowmoney=ran.Next(minmoney,maxmoney);
        double sycount=incount-outarray.Count-1;
        double symoney=inmoney-summoney-nowmoney;
        if((symoney/sycount)<minmoney)
        {
            maxmoney=nowmoney-1;
            return GetRanDouble(ran,incount,inmoney,ref minmoney,ref maxmoney,ref outarray,summoney);
        }
        else if((symoney/sycount)==minmoney)
        {
            outarray.Add(nowmoney);
            int count=incount-outarray.Count;
            for(int i=0;i<count;i++)
            {
                outarray.Add(minmoney);
                
            }
            return 0;
        }
        else if((symoney/sycount)>minmoney&&(symoney/sycount)<maxmoney)
        {
            return nowmoney;
            
        }
        else if((symoney/sycount)==maxmoney)
        {
            outarray.Add(nowmoney);
            int count=incount-outarray.Count;
            for(int i=0;i<count;i++)
            {
                outarray.Add(maxmoney);
                
            }
            return 0;
        }
        else
        {
            minmoney=nowmoney+1;
            return GetRanDouble(ran,incount,inmoney,ref minmoney,ref maxmoney,ref outarray,summoney);
        }
    }
    //生成随机数组
    public List<int> GetList(int incount,double inmoney,double minmoney,double maxmoney)
    {
        List<int> outarray=new List<int>();
        if(minmoney<0.01)
        {
            //
            return outarray;
        }
        if(inmoney/incount<minmoney)
        {
            return outarray;
        }
        int summoney=0;
        int nowinmoney=Convert.ToInt32(inmoney*100);
        int nowmaxmoney=Convert.ToInt32(maxmoney*100);
        int nowminmoney=Convert.ToInt32(minmoney*100);
        
        Random ran=new Random();
        for(int i=0;i<incount;i++)
        {
            if(i+1==incount)
            {
                outarray.Add(nowinmoney-summoney);
                return outarray;
            }
            int now=GetRanDouble(ran,incount,nowinmoney,ref nowminmoney,ref nowmaxmoney,ref outarray,summoney);
            if(now==0)
            {
                return outarray;
            }
            else
            {
                outarray.Add(now);
                summoney+=now;
                   
            }
        }
        return outarray;
    }