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C/C++ DIR±éÀúº¯Êý

#include <list.h>
#include <dirent.h>
#include <iostream.h>
#include <sys/stat.h>
#include <sys/types.h>
/*****************************************************************
*º¯Êý¹¦ÄÜ: Ä¿_¼_±é_Àú.
*·µ»ØÖµ:   ³É¹¦·µ»Ø0,ʧ°Ü·µ»Ø·Ç0.
*²ÎÊý   path : ¿ªÊ¼±éÀúµÄ·¾¶(×îºÃ²»ÒªÊ¹ÓÃÏà¶Ô·¾¶)
*       l    : ±£´æÕÒµ½Â·¾¶µÄstd:list¶ÔÏó
*       field: Òª²éÕÒµÄĿ¼Ãû³Æ.
*              Èç: list("/home/wyq/",list,"tmp");
*              Ôò¿ÉÒÔÕÒµ½ /home/wyq/*/tmp/
*              Èç: list("/home/wyq/",list,"tmp/template");
*              Ôò¿ÉÒÔÕÒµ½ /home/wyq/*/tmp/template
*
*****************************************************************/
int listDir(const  char *path,list<string> &l,char * field = NULL)
{
    using namespace std;
    string Path(path);
    DIR      *pDir ;
    struct dirent  *ent  ;
    char      childpath[10240];
    string    childStr;
    if ( NULL == path )
    {
      return -1;
    }
    if ( '/' != Path[Path.length()-1] )
    {
      Path.append(1,'/');
    }
    if ( '/' != Path[0] )
    {
      Path.insert(0,"/");
    }
    if ( NULL == ( pDir=opendir(Path.c_str()) ) )
    {
      return -1;
  


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int func(x)
{
int countx = 0;
while(x)
{
countx ++;
x = x&(x-1);
}
return countx;
}
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