Could someone explain in simple terms (IN WORDS) what this code is doing? It would help to go line by line and explain. Thank you!

#include #include #include #include #include void findNeedles (const std::string thaystack, const std::vector<:string> &needles) if (needles.size() > 5) std::cerr words; 1/ Split haystack into words std::copy(std::istream_iterator<:string>(haystack_ss), std::istream_iterator<:string>(), std::back_inserter<:vector> >(words)); for(int i = 0; i