使用boost库来计算文件夹的大小

#include <boost/cstdint.hpp>

#include <algorithm>

#include <boost/filesystem.hpp>

#include <boost/bind.hpp>

#include <boost/iterators/transform_iterator.hpp>

namespacefs = boost::filesystem;

boost::uintmax_t dir_size(constfs::path &p)

{

  returnstd::accumulate(

    boost::make_transform_iterator(&fs::file_size, fs::recursive_directory_iterator(p)),

    boost::make_transform_iterator(&fs::file_size, fs::recursive_directory_iterator()),

    static_cast<boost::uintmax_t>(0));

}