文件夹遍历

#include <iostream>
#include <string.h>
#include <io.h>
#include <vector>
#include <algorithm>
using namespace std;
void finddir(const string& name,_finddata_t* fl)
{
    vector<string> str;
    long hd=_findfirst(string(name).append("*.*").c_str(),fl);
    if(hd==-1){_findclose(hd);return;}
    do
    {
        if(fl->attrib&_A_SUBDIR && (!strcmp(fl->name,".")||!strcmp(fl->name,"..")))continue;
        if(fl->attrib&_A_SUBDIR){cout<<string(name).append(fl->name).append("\").c_str()<<endl;str.push_back(string(name).append(fl->name).append("\"));continue;}
        cout<<name.c_str();
        cout<<fl->name<<endl;
    }while(_findnext(hd,fl)!=-1);
    _findclose(hd);
    for(auto it=str.begin();it!=str.end();++it)finddir(*it,fl);
}
int main()
{
    _finddata_t fl;
    finddir(string("D:\"),&fl);
    return 0;
}

 多线程版本

#include "stdafx.h"
#include <iostream>       // std::cout
#include <atomic>         // std::atomic
#include <thread>         // std::thread
#include <vector>         // std::vector
#include <io.h>
#include <mutex>
#include <thread>
#include <chrono>
#include <type_traits>
#include <string>
#include <bitset>
using namespace std;
#define THREAD_COUNT 32
vector <string> directory;
mutex mtx;
bitset<THREAD_COUNT> bst;
atomic<int> file_count;
atomic<int> folder_count;
void print_a_dir(string dir)
{
   _finddata_t* fd=new _finddata_t;
   long hdl=_findfirst(string(dir).append("*.*").c_str(),fd);
   if(hdl==-1){_findclose(hdl);return;}
   do
   {
      if(fd->attrib&_A_SUBDIR && (fd->name)[0]=='.')continue;
      if(fd->attrib&_A_SUBDIR){string temp(dir+fd->name+"\");folder_count++;mtx.lock();directory.push_back(temp);mtx.unlock();continue;}
      file_count++;
      //cout<<dir<<fd->name<<endl;
   }while(_findnext(hdl,fd)!=-1);
   _findclose(hdl);
}
void thread_func(int th_index)
{
   string dir;
   while(1)
   {
      mtx.lock();
      if(directory.empty()){bst[th_index]=1;if(bst.all()){mtx.unlock();return;}mtx.unlock();continue;}
      dir=directory.back();
      directory.pop_back();
      mtx.unlock();
      bst[th_index]=0;
      print_a_dir(dir);
   }
}
int main ()
{
   vector<thread> v_thread;
   directory.push_back("D:\Documents\");
   cout<<directory[0]<<endl;
   for(int i=0;i<THREAD_COUNT;i++)
   v_thread.push_back(thread(thread_func,i));
   for(auto& th : v_thread )th.join();
   cout<<"folder count:"<<folder_count<<endl;
   cout<<"file count:"<<file_count<<endl;
   return 0;
}