/***
 STLµÄÈ«ÅÅÁÐ
***/
#include <string>  
#include <algorithm>  
#include <iostream>  

void func(const char *str_in)  
{  
	std::string str(str_in);  
	std::sort(str.begin(),str.end());  
	do   
	{  
		std::cout<<str<<std::endl;  
	}while (std::next_permutation(str.begin(),str.end()));  
}  

int main()  
{  
	func("caa");  
	while (1);
	return 0;  
}