filesystem value_type pointer to string?

I have a directory_iterator and I want the filename but I can't seem to get anything to work, it just throws an error saying that value_type* cannot be converted into a string. I can't cast it to a string and std::to_string() doesn't work either!

for (auto& p : std::experimental::filesystem::directory_iterator(dir)) {
    auto path = p.path().filename().c_str();
    char f[50] = "Json/";
    std::strcpy(f, path);
    std::ifstream comp(f, std::ifstream::binary);
}

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