字符串的排列（去除重复项）

//The Arrange Of String  abc ----abc,acb,bac,bca,cab,cba
//Delete Repeat Arrange  http://blog.youkuaiyun.com/hackbuteer1/article/details/7462447
//Q:here i use the recursion way to solove this question.What should us do in NO-Recursion??
 
bool IsSwap(char *begin,char *end)
{
	char *p;
	for (p = begin; p < end; p++)
	{
		if (*p == *end)
			return false;
	}
	return true;
}
 

void StringArrange(char *str,char *begin)
{
	if (str == NULL || begin == NULL)
		return;
	if (*begin == '\0')
		cout << str << endl;
	else
	{
		for (char *ch = begin; *ch != '\0'; ch++)
		{
 			if (IsSwap(begin, ch))
 			{
				swap(*begin, *ch);
				StringArrange(str, begin + 1);
     			swap(*begin, *ch);
 			}
		}
	}
}