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// Boost.Units - A C++ library for zero-overhead dimensional analysis and
// unit/quantity manipulation and conversion
//
// Copyright (C) 2003-2008 Matthias Christian Schabel
// Copyright (C) 2008 Steven Watanabe
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
/**
\file
\brief tutorial.cpp
\detailed
Basic tutorial using si units.
Output:
@verbatim
//[tutorial_output
F = 2 N
dx = 2 m
E = 4 J
V = (12.5,0) V
I = (3,4) A
Z = (1.5,-2) Ohm
I*Z = (12.5,0) V
I*Z == V? true
//]
@endverbatim
**/
//[tutorial_code
#include <complex>
#include <iostream>
#include <boost/typeof/std/complex.hpp>
#include <boost/units/systems/si/energy.hpp>
#include <boost/units/systems/si/force.hpp>
#include <boost/units/systems/si/length.hpp>
#include <boost/units/systems/si/electric_potential.hpp>
#include <boost/units/systems/si/current.hpp>
#include <boost/units/systems/si/resistance.hpp>
#include <boost/units/systems/si/io.hpp>
using namespace boost::units;
using namespace boost::units::si;
quantity<energy>
work(const quantity<force>& F,const quantity<length>& dx)
{
return F*dx;
}
int main()
{
/// test calcuation of work
quantity<force> F(2.0*newton);
quantity<length> dx(2.0*meter);
quantity<energy> E(work(F,dx));
std::cout << "F = " << F << std::endl
<< "dx = " << dx << std::endl
<< "E = " << E << std::endl
<< std::endl;
/// check complex quantities
typedef std::complex<double> complex_type;
quantity<electric_potential,complex_type> v = complex_type(12.5,0.0)*volts;
quantity<current,complex_type> i = complex_type(3.0,4.0)*amperes;
quantity<resistance,complex_type> z = complex_type(1.5,-2.0)*ohms;
std::cout << "V = " << v << std::endl
<< "I = " << i << std::endl
<< "Z = " << z << std::endl
<< "I*Z = " << i*z << std::endl
<< "I*Z == V? " << std::boolalpha << (i*z == v) << std::endl
<< std::endl;
return 0;
}
//]
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