昨天写了一个排列算法,不过是P(N,N)的情况,今天把它写完整了,P(N,R) using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ConsoleApplication32 { class Program { static int s = 0; static void Main(string[] args) { Console.WriteLine("输入要排列的数字"); string st<mce:script type="text/javascript" src="http://hi.images.youkuaiyun.com/js/blog/tiny_mce/themes/advanced/langs/zh.js" mce_src="http://hi.images.youkuaiyun.com/js/blog/tiny_mce/themes/advanced/langs/zh.js"></mce:script><mce:script type="text/javascript" src="http://hi.images.youkuaiyun.com/js/blog/tiny_mce/plugins/syntaxhl/langs/zh.js" mce_src="http://hi.images.youkuaiyun.com/js/blog/tiny_mce/plugins/syntaxhl/langs/zh.js"></mce:script>rs = Console.ReadLine(); List<string> li