How can I find the size of all files located inside a folder?

Question

Is there any API in c++ for getting the size of a specified folder?

If not, how can I get the total size of a folder including all subfolders and files?

Answer 1

5 years and not a simple solution with standard C++, that's why I would like to contribute my solution to this question:

uint64_t GetDirSize(const std::string &path)
{
    uint64_t size = 0;
    for (const auto & entry : std::experimental::filesystem::directory_iterator(path))
    {
        if(entry.status().type() == std::experimental::filesystem::file_type::regular)
            size += std::experimental::filesystem::file_size(entry.path());
        if (entry.status().type() == std::experimental::filesystem::file_type::directory)
            size += GetDirSize(entry.path().generic_string());
    }
    return size;
}

Use it for example by calling GetDirSize("C:\\dir_name") if you're using Windows.