常见的抽奖-根据指定概率抽奖改进

原文：http://blog.csdn.net/yysyangyangyangshan/article/details/12063343

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.Regularexpressions;

namespace TestRandomProbability
{
    class Program
    {
        static void Main（string[] args）
        {
            List> elements = new List>（）;

            elements.Add（new KeyValuePair（0 0.000002））;

            elements.Add（new KeyValuePair（1 0.000004））;

            elements.Add（new KeyValuePair（2 0.0001））;

            elements.Add（new KeyValuePair（3 0.0001））;

            elements.Add（new KeyValuePair（4 0.0003））;

            elements.Add（new KeyValuePair（5 0.000004））;

            elements.Add（new KeyValuePair（6 0.000004））;

            elements.Add（new KeyValuePair（7 0.00016））;

            elements.Add（new KeyValuePair（8 0.000008））;

            elements.Add（new KeyValuePair（9 0.00012））;

            elements.Add（new KeyValuePair（10 0.0））;

            elements.Add（new KeyValuePair（11 0.999198））;

            Dictionary prize = new Dictionary（）;

            prize.Add（0 @“奖品1“）;

            prize.Add（1 @“奖品2“）;

            prize.Add（2 @“奖品3“）;

            prize.Add（3 @“奖品4“）;

            prize.Add（4 @“奖品5“）;

            prize.Add（5 @“奖品6“）;

            prize.Add（6 @“奖品7“）;

            prize.Add（7 @“奖品8“）;

            prize.Add（8 @“奖品9“）;

            prize.Add（9 @“奖品10“）;

            prize.Add（10 @“奖品11“）;

            prize.Add（11 @“谢谢参与！“）;

            //求出概率基数

            long basicNumber = 0;

            double[] array = new double[elements.Count];

            int m=0;

            foreach （KeyValuePair item in elements）
            {
                array[m] = item.Value;

                m++;
            }

            basicNumber = ToolMethods.GetbaseNumber（array）;


            //判断设置的概率
            double allRate = 0;

            foreach （var item in elements）
            {
                allRate += item.Value;
            }

            if （allRate != 1）
            {
                Console.WriteLine（“奖品概率设置错误！“）;

                Console.WriteLine（allRate）;

                Console.ReadLine（）;

                return;
            }

            //抽奖
            Random random = new Random（）;

            long selectedElement = 0;

            while （true）
            {
                for （int n = 0; n < 20; n++）
                {
                    long diceRoll = ToolMethods.GetRandomNumber（random1basicNumber）;

                    long cumulative = 0;

                    for （int i = 0; i < elements.Count; i++）
                    {
                        cumulative += （long）（ele

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    ..A..H.     16384  2013-09-26 15:32  TestRandomProbability.suo

     文件        144  2013-09-25 16:42  TestRandomProbability\app.config

     文件       7680  2013-09-26 17:49  TestRandomProbability\bin\Debug\TestRandomProbability.exe

     文件        144  2013-09-25 16:42  TestRandomProbability\bin\Debug\TestRandomProbability.exe.config

     文件      19968  2013-09-26 17:49  TestRandomProbability\bin\Debug\TestRandomProbability.pdb

     文件      11600  2013-09-26 17:49  TestRandomProbability\bin\Debug\TestRandomProbability.vshost.exe

     文件        144  2013-09-25 16:42  TestRandomProbability\bin\Debug\TestRandomProbability.vshost.exe.config

     文件        490  2010-03-17 22:39  TestRandomProbability\bin\Debug\TestRandomProbability.vshost.exe.manifest

     文件       5899  2013-09-26 17:49  TestRandomProbability\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件        726  2013-09-26 17:49  TestRandomProbability\obj\x86\Debug\TestRandomProbability.csproj.FileListAbsolute.txt

     文件       7680  2013-09-26 17:49  TestRandomProbability\obj\x86\Debug\TestRandomProbability.exe

     文件      19968  2013-09-26 17:49  TestRandomProbability\obj\x86\Debug\TestRandomProbability.pdb

     文件       3680  2013-09-26 17:48  TestRandomProbability\Program.cs

     文件       1374  2013-09-25 09:27  TestRandomProbability\Properties\AssemblyInfo.cs

     文件       2621  2013-09-26 09:08  TestRandomProbability\TestRandomProbability.csproj

     文件       3035  2013-09-26 09:27  TestRandomProbability\ToolMethods.cs

     文件        905  2013-09-25 09:27  TestRandomProbability.sln

     目录          0  2013-09-25 09:27  TestRandomProbability\obj\x86\Debug\TempPE

     目录          0  2013-09-26 17:49  TestRandomProbability\obj\x86\Debug

     目录          0  2013-09-25 16:42  TestRandomProbability\bin\Debug

     目录          0  2013-09-25 09:27  TestRandomProbability\obj\x86

     目录          0  2013-09-25 09:27  TestRandomProbability\bin

     目录          0  2013-09-25 09:27  TestRandomProbability\obj

     目录          0  2013-09-25 09:27  TestRandomProbability\Properties

     目录          0  2013-09-26 09:02  TestRandomProbability

----------- ---------  ---------- -----  ----

               102442                    25