一个随机数类-白红宇

一个随机数类

阅读量：7028 次

发布时间：2019-06-28

本文共 2395 字，大约阅读时间需要 7 分钟。

本类思想：高性能计数器以微妙级累加数值，逢十进位。如果动态的单看数值最后一个数字，一定是在0-9之间不断旋转，就像一个滚动的俄罗斯轮盘，暂停时一定指向其中某一位数字并且指向哪个数字是不可预测的，当暂停次数足够多时，分布在各个数值上的概率无限接近。

using System.Runtime.InteropServices;namespace SuiJiShu{    ///     /// 随机数生成器    /// 
    public class SuiJiShuShengChengQi    {        //获取高性能计数器数值        [DllImport("kernel32.dll")]        extern static short QueryPerformanceCounter(ref long x);        ///         /// 十以内随机数        /// 
        /// 
             public int ShiYiNeiSuiJiShu()        {            long _dangQianJiShuQiZhi = 0;            QueryPerformanceCounter(ref _dangQianJiShuQiZhi);            string _dangQianJiShuQiZhiString = _dangQianJiShuQiZhi.ToString();            return int.Parse(_dangQianJiShuQiZhiString.Remove(0, _dangQianJiShuQiZhiString.Length - 1));        }        ///         /// 百以内随机数        /// 
        /// 
             public int BaiYiNeiSuiJiShu()        {            long _dangQianJiShuQiZhi = 0;            QueryPerformanceCounter(ref _dangQianJiShuQiZhi);            string _dangQianJiShuQiZhiString = _dangQianJiShuQiZhi.ToString();            return int.Parse(_dangQianJiShuQiZhiString.Remove(0, _dangQianJiShuQiZhiString.Length - 2));        }        ///         /// 千以内随机数        /// 
        /// 
             public int QianYiNeiSuiJiShu()        {            long _dangQianJiShuQiZhi = 0;            QueryPerformanceCounter(ref _dangQianJiShuQiZhi);            string _dangQianJiShuQiZhiString = _dangQianJiShuQiZhi.ToString();            return int.Parse(_dangQianJiShuQiZhiString.Remove(0, _dangQianJiShuQiZhiString.Length - 3));        }    }}

//ShiYiNeiSuiJiShu运行一百万次数值分布：0:978721:1000822:1002373:998954:1005565:999956:1003847:999288:1003399:100712//测试代码Dictionary

> _tongJiZiDian = new Dictionary

>();for (int i = 0; i < 10; i++){ _tongJiZiDian.Add(i, new List

());}SuiJiShuShengChengQi _SuiJiShuShengChengQi = new SuiJiShuShengChengQi();for (int i = 0; i < 1000000; i++){ int _suiJiShu = _SuiJiShuShengChengQi.ShiYiNeiSuiJiShu(); _tongJiZiDian[_suiJiShu].Add(_suiJiShu);}StringBuilder _sss = new StringBuilder();foreach (KeyValuePair

> key in _tongJiZiDian){ _sss.Append(key.Key.ToString() + ":" + key.Value.Count.ToString() + "\r\n");}

写作时间：2018-11-07

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转载于:https://www.cnblogs.com/j20171203/p/9922447.html