Quote.cpp

 #include <memory>
 #include "Quote.h"

double Quote::net_price(std::size_t n) const
{
	return n * price;
}

double print_total(std::ostream & os, const Quote & item, std::size_t n)
{
	double ret = item.net_price(n);
	os << "ISBN: " << item.isbn() << " # sold: " << n << " total due: " << ret << std::endl;
	return ret;
}

double Bulk_quote::net_price(std::size_t cnt) const
{
	if(cnt >= quantity)
		return cnt * (1 - discount) * price;
	else
		return cnt * price;
} 

std::ostream & Quote::debug(std::ostream & os) const
{
	os << bookNo << " " << price;
	return os;
}

std::ostream & Disc_quote::debug(std::ostream & os) const
{
	this->Quote::debug(os) << " " << quantity << " " << discount;
	return os;
}

double Basket::total_receipt(std::ostream &os) const
{
	double sum = 0.0;
	for(std::multiset<std::shared_ptr<Quote>, decltype(compare)*>::const_iterator iter = items.cbegin(); iter != items.cend(); iter = items.upper_bound(*iter))
		sum += print_total(os, **iter, items.count(*iter));
	os << "Total Sales: " << sum << std::endl;
	return sum;
}