static string[] m_Data = { "A", "B", "C", "D", "E" };
static void Main(string[] args)
{
Dictionary<string, int> dic = new Dictionary<string, int>();
for (int i = 0; i < m_Data.Length; i++)
{
Console.WriteLine(m_Data[i]);//如果不需要打印单元素的组合，将此句注释掉
dic.Add(m_Data[i], i);
}
GetString(dic);
Console.ReadLine();
}
static void GetString(Dictionary<string, int> dd)
{
Dictionary<string, int> dic = new Dictionary<string, int>();
foreach (KeyValuePair<string, int> kv in dd)
{
for (int i = kv.Value + 1; i < m_Data.Length; i++)
{
Console.WriteLine(kv.Key + m_Data[i]);
dic.Add(kv.Key + m_Data[i], i);
}
}
if (dic.Count > 0) GetString(dic);
}