exercise10_32.cpp

#include <iostream>
#include <vector>
#include <algorithm>
#include <iterator>
#include <numeric>
#include "Sales_item.h"

int main()
{
	std::istream_iterator<Sales_item> in_iter(std::cin), in_eof;
	std::vector<Sales_item> vec;

	while (in_iter != in_eof)
		vec.push_back(*in_iter++);
	sort(vec.begin(), vec.end(), compareIsbn);
	for (auto beg = vec.cbegin(), end = beg; beg != vec.cend(); beg = end)
	{
		end = find_if(beg, vec.cend(), [beg](const Sales_item &item) { return item.isbn() != beg->isbn(); });
		std::cout << std::accumulate(beg, end, Sales_item(beg->isbn())) << std::endl;
	}

	return 0;
}