摘要： [STAThread]staticvoidMain(){strings="abcd";char[]add=s.ToCharArray();pai(refadd,0,s.Length);Console.ReadKey();}//递归privatestaticvoidpai(refchar[]str,intm,intn){if(m<n){for(inti=0;i<=m;i++){pai(refstr,m+1,n);chang(refstr,m);}}else{Console.WriteLine(str);}}//移位privatestaticvoidchang(re 阅读全文