asp.net C# 排列组合 非递归

using System;
using System.Collections.Generic;
using System.Text;
namespace ConsoleApplication2
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("/*\n------输出结果------------");
getSplit("ABCDEFG");
Console.WriteLine("*/");
/*
------输出结果------------
AB
AC
AD
AE
AF
AG
BC
BD
BE
BF
BG
CD
CE
CF
CG
DE
DF
DG
EF
EG
FG
ABC
ABD
ABE
ABF
ABG
BCD
BCE
BCF
BCG
CDE
CDF
CDG
DEF
DEG
EFG
ABCD
ABCE
ABCF
ABCG
BCDE
BCDF
BCDG
CDEF
CDEG
DEFG
ABCDE
ABCDF
ABCDG
BCDEF
BCDEG
CDEFG
ABCDEF
ABCDEG
BCDEFG
ABCDEFG
*/
Console.ReadLine();
}
private static void getSplit(string str)
{
for (int num = 1; num < str.Length; num++)
{
for (int i = 0; i < str.Length; i++)
{
for (int j = i + 1; j < str.Length; j++)
{
int count = num - 1 + j;
if (count < str.Length)
Console.WriteLine(str.Substring(i, num) + str.Substring(count, 1));
}
}
}
}