在Linux下，用 c++ 遍历目录下的所有文件比较简单，代码如下，有需要的可以参考。

#include <iostream>  

#include <stdio.h>  

#include <unistd.h>  

#include <dirent.h>  

#include <stdlib.h>  

#include <sys/stat.h>  

#include <string.h>  

using namespace std;  

/***** Global Variables *****/  

char dir[100] = "/home";  

int const MAX_STR_LEN = 200;  

/* Show all files under dir_name , do not show directories ! */  

void showAllFiles( const char * dir_name )  

{  

// check the parameter !  

if( NULL == dir_name )  

{  

cout<<" dir_name is null ! "<<endl;  

return;  

}  

// check if dir_name is a valid dir  

struct stat s;  

lstat( dir_name , &s );  

if( ! S_ISDIR( s.st_mode ) )  

{  

cout<<"dir_name is not a valid directory !"<<endl;  

return;  

}  

struct dirent * filename;    // return value for readdir()  

DIR * dir;                   // return value for opendir()  

dir = opendir( dir_name );  

if( NULL == dir )  

{  

cout<<"Can not open dir "<<dir_name<<endl;  

return;  

}  

cout<<"Successfully opened the dir !"<<endl;  

/* read all the files in the dir ~ */  

while( ( filename = readdir(dir) ) != NULL )  

{  

// get rid of "." and ".."  

if( strcmp( filename->d_name , "." ) == 0 ||   

strcmp( filename->d_name , "..") == 0    )  

continue;  

cout<<filename ->d_name <<endl;  

}  

}   

int main()  

{  

// 测试  

showAllFiles( dir );