129 lines
4.7 KiB
C++
129 lines
4.7 KiB
C++
// Boost.Units - A C++ library for zero-overhead dimensional analysis and
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// unit/quantity manipulation and conversion
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//
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// Copyright (C) 2003-2008 Matthias Christian Schabel
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// Copyright (C) 2008 Steven Watanabe
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//
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// Distributed under the Boost Software License, Version 1.0. (See
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// accompanying file LICENSE_1_0.txt or copy at
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// http://www.boost.org/LICENSE_1_0.txt)
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/**
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\file
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\brief quantity.cpp
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\details
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Test quantity algebra.
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Output:
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@verbatim
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//[quantity_output_double
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L = 2 m
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L+L = 4 m
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L-L = 0 m
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L*L = 4 m^2
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L/L = 1 dimensionless
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L*meter = 2 m^2
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kilograms*(L/seconds)*(L/seconds) = 4 m^2 kg s^-2
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kilograms*(L/seconds)^2 = 4 m^2 kg s^-2
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L^3 = 8 m^3
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L^(3/2) = 2.82843 m^(3/2)
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2vL = 1.41421 m^(1/2)
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(3/2)vL = 1.5874 m^(2/3)
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//]
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//[quantity_output_complex
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L = (3,4) m
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L+L = (6,8) m
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L-L = (0,0) m
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L*L = (-7,24) m^2
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L/L = (1,0) dimensionless
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L*meter = (3,4) m^2
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kilograms*(L/seconds)*(L/seconds) = (-7,24) m^2 kg s^-2
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kilograms*(L/seconds)^2 = (-7,24) m^2 kg s^-2
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L^3 = (-117,44) m^3
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L^(3/2) = (2,11) m^(3/2)
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2vL = (2,1) m^(1/2)
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(3/2)vL = (2.38285,1.69466) m^(2/3)
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//]
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@endverbatim
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**/
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#include <complex>
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#include <iostream>
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#include <boost/mpl/list.hpp>
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#include <boost/typeof/std/complex.hpp>
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#include <boost/units/pow.hpp>
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#include <boost/units/quantity.hpp>
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#include <boost/units/io.hpp>
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#include "test_system.hpp"
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int main(void)
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{
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using namespace boost::units;
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using namespace boost::units::test;
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{
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//[quantity_snippet_1
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quantity<length> L = 2.0*meters; // quantity of length
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quantity<energy> E = kilograms*pow<2>(L/seconds); // quantity of energy
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//]
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std::cout << "L = " << L << std::endl
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<< "L+L = " << L+L << std::endl
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<< "L-L = " << L-L << std::endl
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<< "L*L = " << L*L << std::endl
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<< "L/L = " << L/L << std::endl
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<< "L*meter = " << L*meter << std::endl
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<< "kilograms*(L/seconds)*(L/seconds) = "
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<< kilograms*(L/seconds)*(L/seconds) << std::endl
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<< "kilograms*(L/seconds)^2 = "
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<< kilograms*pow<2>(L/seconds) << std::endl
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<< "L^3 = "
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<< pow<3>(L) << std::endl
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<< "L^(3/2) = "
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<< pow<static_rational<3,2> >(L) << std::endl
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<< "2vL = "
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<< root<2>(L) << std::endl
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<< "(3/2)vL = "
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<< root<static_rational<3,2> >(L) << std::endl
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<< std::endl;
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}
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{
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//[quantity_snippet_2
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quantity<length,std::complex<double> > L(std::complex<double>(3.0,4.0)*meters);
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quantity<energy,std::complex<double> > E(kilograms*pow<2>(L/seconds));
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//]
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std::cout << "L = " << L << std::endl
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<< "L+L = " << L+L << std::endl
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<< "L-L = " << L-L << std::endl
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<< "L*L = " << L*L << std::endl
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<< "L/L = " << L/L << std::endl
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<< "L*meter = " << L*meter << std::endl
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<< "kilograms*(L/seconds)*(L/seconds) = "
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<< kilograms*(L/seconds)*(L/seconds) << std::endl
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<< "kilograms*(L/seconds)^2 = "
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<< kilograms*pow<2>(L/seconds) << std::endl
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<< "L^3 = "
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<< pow<3>(L) << std::endl
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<< "L^(3/2) = "
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<< pow<static_rational<3,2> >(L) << std::endl
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<< "2vL = "
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<< root<2>(L) << std::endl
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<< "(3/2)vL = "
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<< root<static_rational<3,2> >(L) << std::endl
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<< std::endl;
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}
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return 0;
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}
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