reverseSentence.cpp

string reverseSentence (string const& s)
{
    string t (s.rbegin (), s.rend ());

    for (auto p = begin (t), q = begin (t); p != end (t); ) {
        p = find_if (p, end (t), [] (char c) { return c != ' '; });
        q = find (p, end (t), ' ');
        reverse (p, q);
        p = q;
    }

    return move (t);
}