Parsing twitter followers

#include <onidev/markup.h>
#include <onidev/core/tools.h>
#include <algorithm>

int main()
{
    std::vector<std::string> users;

    using namespace od;
    auto node = HtmlNode::parseString( fileReadText("centauri_followers.html") );
    HtmlNode* root = node->findRec("div", "class", "GridTimeline-items");

    for(auto& n: root->childs())
    {
        for(auto& n2: n->childs())
        {
            HtmlNode* n3 = n2->findRec("a");
            users.push_back(n3->findAttribute("href"));
        }
    }
    FILE* f = fopen("centauri_followers.txt", "w");
    for(auto& user: users)
        fprintf(f, "%s\n", user.c_str());
    fclose(f);

    return 0;
}