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  Àý£º  input :  abc
        output:  abc
                acb
                bac
                bca
                cab
                cba


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http://www.bxmy.org/combi/hbr_combination.hpp

ºÜ¸ßÐËżµÄÍøÖ·±»ÌùÉÏÁË£¬²»¹ýÕâÎÊÌâÆäʵÊÇ <algorithm> std::next_permutation() ¿ÉÒÔ×öµ½µÄÊÂÇ飬¶ø²»ÊÇ combination¡£ÅÅÁУ¬²»ÊÇ×éºÏ¡­¡­

¼ÙÉèµ¥´ÊΪ std::string word;
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std::vector <char> new_word(word.begin(), word.end());
std::sort(new_word.begin(), new_word.end());
do
{
  printf ("one word: %s\n", std::string(new_word.begin(), new_word.end()).c_str());
}
while (std::next_permutation(new_word.begin(), new_word.end());

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http://www.bxmy.org/combi/hbr_combination.hpp

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linux»·¾³ÏÂgethostbynameº¯ÊýÎÊÌâ - C/C++ / CÓïÑÔ

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  struct hostent *hp; 
char AlarmDevIP[20];  
  int x2;

hp = gethostbyname("www.google.com");
if (hp)
{ ......

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cÓïÑÔʵÏÖlinux timeÏà¹Øº¯Êý - C/C++ / CÓïÑÔ

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