sections_with_match.cpp

#include <iostream>
#include <fstream>
#include <vector>
#include <set>
#include <boost/regex.hpp>
#include <boost/algorithm/string/find.hpp>

const boost::regex frequency_line("^Matches found.*$");

int main(int argc, char* argv[]) {

	std::ifstream is("");
	std::vector<std::string> *frequency_data_lines = new std::vector<std::string>;
	std::set<std::string> *test = new std::set<std::string>;
	std::string search_string("");
	std::string current_frequency_line;

	for (std::string str; std::getline(is, str);) {
		//std::cout << str << std::endl;

		boost::smatch match;

		if(boost::regex_match(str, match, frequency_line)) {
			//frequency_data_lines->push_back(str);
			//test->insert(str);

			current_frequency_line = str;
		}

		boost::iterator_range<std::string::const_iterator> rng;
		rng = boost::ifind_first(str, search_string);

		if(rng) {
			test->insert(current_frequency_line);
		}
	}

	for (std::set<std::string>::iterator it = test->begin(); it != test->end(); ++it)
		std::cout << *it << std::endl;

	delete frequency_data_lines;
	delete test;
	return 0;
}