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68 lines
2.3 KiB
C++
68 lines
2.3 KiB
C++
// The MIT License (MIT)
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//
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// Copyright (c) 2018 Mateusz Pusz
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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#include "units/si/velocity.h"
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#include <iostream>
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namespace {
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using namespace units::literals;
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template<units::Length D, units::Time T>
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constexpr units::Velocity avg_speed(D d, T t)
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{
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return d / t;
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}
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template<units::Velocity V, units::Time T>
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void example_1(V v, T t)
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{
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const units::Length distance = v * t;
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std::cout << "A car driving " << v.count() << " km/h in a time of " << t.count() << " minutes will pass "
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<< units::quantity_cast<units::length<units::meter, double>>(distance).count() << " meters.\n";
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}
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void example_2(double distance_v, double duration_v)
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{
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units::length<units::kilometer> distance(distance_v);
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units::time<units::hour> duration(duration_v);
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const auto kmph = avg_speed(distance, duration);
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std::cout << "Average speed of a car that makes " << distance.count() << " km in "
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<< duration.count() << " hours is " << kmph.count() << " km/h.\n";
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}
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}
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int main()
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{
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try {
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example_1(60_kmph, 10.0_min);
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example_2(220, 2);
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}
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catch (const std::exception& ex) {
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std::cerr << "Unhandled std exception caught: " << ex.what() << '\n';
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}
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catch (...) {
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std::cerr << "Unhandled unknown exception caught\n";
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}
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}
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