Поиск файлов c расширением ".jpg" в папке

#include "windows.h"
#include <stdio.h>
#include <string>
using namespace std;
 
int main()
{
WIN32_FIND_DATA f;
/////////////////////////////////////////////
HANDLE h = FindFirstFile("E:\\YourFolder\\*.jpg", &f);
if(h != INVALID_HANDLE_VALUE)
{
do
{
std::string fname = "E:\\YourFolder\\"+(std::string)f.cFileName; //забираем имя файла.
}
while(FindNextFile(h, &f));
}
///////////////////////////////////////
return 0;
}

#include <iostream>
#include <vector>
#include <boost/filesystem.hpp>
#include <boost/range/algorithm.hpp>
#include <boost/phoenix.hpp>
#include <boost/phoenix/function.hpp>
 
namespace fs = boost::filesystem;
namespace phx = boost::phoenix;
namespace range = boost::range;
using namespace phx::placeholders;
using phx::cref;
 
BOOST_PHOENIX_ADAPT_FUNCTION(bool, is_reg_file, fs::is_regular_file, 1)
BOOST_PHOENIX_ADAPT_FUNCTION(fs::path, ext, fs::extension, 1)
 
int main()
{
   fs::path directory_path("D:\\Temp");
   std::vector<fs::path> files{fs::recursive_directory_iterator(directory_path),
                               fs::recursive_directory_iterator()};
 
   files.erase(range::remove_if(files, !is_reg_file(cref(arg1))
                                || ext(cref(arg1)) != ".jpg"), files.end());
 
   for (auto &p : files)
      std::cout << p.filename() << "\n";
}