getFileList.cpp

#include <cassert>
#include <iostream>
#include <string>
#include <filesystem>

int main(int argc, const char** argv) {
   std::string inputPathname;
   if (argc == 2) {
      inputPathname = argv[1];
   } else {
      std::cout << "Too few arguments" << std::endl;
      return 1;
   }
   std::filesystem::path inputPath = inputPathname.c_str();
   bool res = std::filesystem::exists(inputPath);
   if (!res) {
      std::cout << "could not open " << inputPathname << std::endl;
      return -1;
   }

   std::cout << "target directory  : " << inputPath << std::endl;
   for (const auto & entry : std::filesystem::directory_iterator(inputPath)) {
      if (entry.path().extension() == ".xml") {
         std::cout << entry.path() << std::endl;
      }
   }
}