All files in directory (for OpenCV train)

#include <opencv2/core/core.hpp>
#include <opencv2/highgui/highgui.hpp>
#include <opencv2\imgproc\imgproc.hpp>
#include <fstream>
#include <filesystem>
#include <string>

int main()
{
    Mat image;
    std::ofstream data("Bad.dat");
    data.clear();
    for (auto& p : std::experimental::filesystem::directory_iterator("Bad")) //in c++17 std::filesystem::directory_iterator
    {
        std::string path(p.path().string());
        image = imread(path, IMREAD_COLOR);
        //Good:
       // data << p << " 1 0 0 " << image.cols << ' ' << image.rows<<std::endl;
        //Bad:
        data << p << std::endl;
    }
    data.close();
    return 0;
}