Random:
Random ran=new Random();//初始化
int a=ran.Next(10);
Console.WhiteLine(a);
Console.ReadLine();
//随机出验证码,对照输入,判断是否正确; string s = "abcdefghijklmnopqistuvwxyzABCDEFGHIJKLMNOPQISTUVWXYZ0123456789"; Random ran = new Random(); for (; ; ) { string biao = ""; for (int i = 1; i <= 4; i++) { biao += s.Substring(ran.Next(s.Length), 1); } Console.WriteLine(biao); Console.Write("请输入验证码:"); string shu = Console.ReadLine(); if (shu.ToLower() == biao.ToLower()) { Console.WriteLine("输入正确"); break; } else { Console.Clear(); Console.WriteLine("输入错误!"); } } Console.ReadLine();
时间: 2024-11-09 00:55:06