Random伪随机数

【文件属性】：
文件名称：Random伪随机数
文件大小：33.58MB
文件格式：CHM
更新时间：2015-04-19 20:47:40
Random伪随机数 using System;using System.Collections.Generic;using System.Linq;using System.Text;using System.Threading;namespace 伪随机数{ class Program { static void Main(string[] args) { Random rnd=new Random (); char c; Random ro = new Random(); Console.WriteLine("{0}", ro); int d = ro.Next(); Console.WriteLine("{0}",d); Random rc = new Random(); int f = rc.Next(); Console.WriteLine("{0}",f); //Thread.Sleep(10000); //Console.WriteLine("time later 10000"); Random s = new Random(); double cc = s.NextDouble(); Console.WriteLine("{0}",cc); int count = 4; Random[] rnds = new Random[count]; int[] ss = new int[4]; for (int i = 0; i < count; i++) { rnds[i] = new Random(unchecked((int)(DateTime.Now.Ticks >> i))); ss[i] = rnds[i].Next(); Console.WriteLine("{0}",ss[i]); } Random ww = new Random(); double ee = ww.NextDouble(); string gg = string.Format("{0:F5}", ee); Console.WriteLine("{0}",gg); int k = rc.Next(65, 91); c = (char)k; Console.WriteLine("{0}", c); string rr; rr = GetLetter(rnd); Console.WriteLine("{0}",rr); Console.ReadKey(); } public static string GetLetter(Random rnd) { // A-Z ASCII值 65-90 // a-z ASCII值 97-122 int i = rnd.Next(65, 123); char o = (char)i; if (char.IsLetter(o)) { return o.ToString(); } else { // 递归调用，直到随机到字母 return GetLetter(rnd); } } }}