boost_units.cpp

/*
g++ -std=c++11 boost_units.cpp -o boost_units
*/
#include <iostream>

#include <boost/units/systems/si/prefixes.hpp>
#include <boost/units/systems/si/length.hpp>
#include <boost/units/systems/si/io.hpp>

#include <boost/units/systems/si/velocity.hpp>
#include <boost/units/base_units/metric/minute.hpp>


using namespace boost::units;
using namespace boost::units::si;

int main()
{
	auto l1 = 2 * meter;
	auto l2 = static_cast<quantity<decltype(milli*meter)>>(l1);
	std::cout << l1 << " -> " << l2 << "\n";
	
	auto minute = metric::minute_base_unit::unit_type();
	auto speed = 2000 * ((milli*meter) / minute);
	std::cout << speed << "\n";
	
	auto s2 = static_cast<quantity<velocity>>(speed);
	std::cout << s2 << "\n";
	
	return 0;
}