本文实例报告了C#生成随机数功用。分享给人人供人人参考,细致以下:
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace csharp { class Program { static void Main(string[] args) { Console.WriteLine("生成随机数\n"); int randCount = 9;//随机数发的个数 int randMin = 1;//随机数最小值 int randMax = 21;//随机数最大值 int randIndex, flag, temp; randIndex = temp = flag = 0; Random rand = new Random(); int[] randArr = new int[randCount]; randArr[0] = rand.Next(randMin, randMax); while (true) { flag = 0; temp = rand.Next(randMin, randMax); for (int i = 0; i <= randIndex; i++) { if (temp == randArr[i]) { flag = 1; break; } } if (flag == 1)//假如 flag == 1 则有反复的数字生成。 { continue; } else if (flag == 0) { randIndex++; randArr[randIndex] = temp; } if (randIndex >= randCount - 1)//假如到达 randCount 退出轮回 { break; } } for (int i = 0; i < randCount; i++) { Console.WriteLine("arr[" + i + "]=" + randArr[i]); } Console.WriteLine("\n任意键退出。"); Console.ReadLine(); } } }
生成无反复的随机数
运转效果以下:
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