#include <iostream>
#include <experimental/filesystem>
#include <string>

namespace fs = std::experimental::filesystem;

int main() {
    std::string path = "/tmp";
    std::string ext = ".jpg";

    for (const auto & entry : fs::directory_iterator(path)) {
        std::string curExt = entry.path().extension().c_str();
        if (std::equal(ext.begin(), ext.end(), curExt.begin())) {
            std::cout << entry.path() << std::endl;
        }
    }
}

// clang++ ls.cpp -std=c++11 -lstdc++fs