/* 迅捷PDF虚拟打印机 http://dayinji.xjpdf.com/ 算法出自：https://www.52pojie.cn/thread-645421-1-1.html */ using System; class MainClass { static void Main() { //下面的是机器码 string machineCode="123456789012"; //上面的是机器码 var num = Convert.ToInt64(machineCode); for (var i = 0; i < 68; i++) { var text = (num * 2L).ToString(); num = Convert.ToInt64(text.Length <= 12 ? text : text.Substring(0, 12)); } Console.WriteLine("机器码："+machineCode); Console.WriteLine("注册码："+num.ToString()); } }