#include <Windows.h>

 #include <stdint.h>

 #include <cstdio>

 #include <cstring>

 #include <string>

 #include <queue>

 typedef int8_t (__stdcall *P_WALKDIR_CALLBACK)(const char *In_pcFilePath);

 int8_t WalkDir(const char *In_pcRootDir, P_WALKDIR_CALLBACK In_pfunCallBack)

 {

     int8_t          i8RetVal = ;

     std::string     strLocalRoot;

     std::queue<std::string> qDirectory;

     if (In_pcRootDir == NULL || In_pfunCallBack == NULL)

     {

         i8RetVal = -;

         goto fun_ret;

     }

     strLocalRoot = In_pcRootDir;

     if (strLocalRoot.empty())

     {

         i8RetVal = -;

         goto fun_ret;

     }

     char cRootBack = strLocalRoot.back();

     if (cRootBack != '\\' && cRootBack != '/')

     {

         strLocalRoot += '\\';

     }

     qDirectory.push(strLocalRoot);

     do

     {

         std::string     strDirForWalk   = qDirectory.front();

         WIN32_FIND_DATA Win32FindData   = {};

         HANDLE          hFindHandle     = NULL;

         qDirectory.pop();

         hFindHandle = FindFirstFile((strDirForWalk + "*").c_str(), &Win32FindData);

         if (hFindHandle == INVALID_HANDLE_VALUE)

         {

             continue;

         }

         if (strcmp(Win32FindData.cFileName, ".") !=  && strcmp(Win32FindData.cFileName, "..") != )

         {

             if (Win32FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)

             {

                 qDirectory.push(strDirForWalk + Win32FindData.cFileName + "\\");

             }

             else

             {

                 In_pfunCallBack((strDirForWalk + Win32FindData.cFileName).c_str());

             }

         }

         while (FindNextFile(hFindHandle, &Win32FindData))

         {

             if (strcmp(Win32FindData.cFileName, ".") !=  && strcmp(Win32FindData.cFileName, "..") != )

             {

                 if (Win32FindData.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)

                 {

                     qDirectory.push(strDirForWalk + Win32FindData.cFileName + "\\");

                 }

                 else

                 {

                     In_pfunCallBack((strDirForWalk + Win32FindData.cFileName).c_str());

                 }

             }

         }

         if (hFindHandle != NULL)

         {

             FindClose(hFindHandle);

         }

     } while (!qDirectory.empty());

 fun_ret:

     return i8RetVal;

 }

 int8_t __stdcall WalkDirCallBack(const char *In_pcFilePath)

 {

     if (In_pcFilePath != NULL)

     {

         printf("%s\n", In_pcFilePath);

     }

     return ;

 }

 void main(int argc, char **argv)

 {

     WalkDir(argv[], WalkDirCallBack);

     return;

 }