File Search

#include <iostream>
#include <string>
#include <algorithm>
#include <functional>
#include <boost/ref.hpp>
#include <boost/filesystem.hpp>

using namespace std;
using namespace boost::filesystem;

struct file_search: binary_function<directory_entry, path, bool>
{
    bool operator()(const directory_entry& file, const path& filename) const
    {
        return file.status().type()==directory_file ?
            find_if(directory_iterator(file), directory_iterator(), bind2nd(file_search(), boost::ref(filename)))!=directory_iterator() :
            file.path().filename()==filename;
    }
};

int main()
{
    path filename, the_path;
    cin >> filename >> the_path;
    if (file_search()(directory_entry(the_path), filename))
        cout << "Found!";
    else
        cout << "Not found!";
}