mirror of
https://github.com/mpusz/mp-units.git
synced 2026-01-27 17:42:33 +01:00
141 lines
6.4 KiB
C++
141 lines
6.4 KiB
C++
// The MIT License (MIT)
|
|
//
|
|
// Copyright (c) 2018 Mateusz Pusz
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
// of this software and associated documentation files (the "Software"), to deal
|
|
// in the Software without restriction, including without limitation the rights
|
|
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
|
|
// copies of the Software, and to permit persons to whom the Software is
|
|
// furnished to do so, subject to the following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included in all
|
|
// copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
|
|
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
|
|
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
|
|
// SOFTWARE.
|
|
|
|
#include <units/format.h>
|
|
#include <units/isq/si/fps/density.h> // IWYU pragma: keep
|
|
#include <units/isq/si/fps/length.h>
|
|
#include <units/isq/si/fps/mass.h>
|
|
#include <units/isq/si/fps/power.h>
|
|
#include <units/isq/si/fps/speed.h>
|
|
#include <units/isq/si/fps/time.h>
|
|
#include <units/isq/si/fps/volume.h>
|
|
#include <units/isq/si/international/speed.h>
|
|
#include <units/isq/si/length.h>
|
|
#include <units/isq/si/mass.h>
|
|
#include <units/isq/si/power.h>
|
|
#include <units/isq/si/speed.h>
|
|
#include <units/isq/si/time.h>
|
|
#include <units/isq/si/volume.h>
|
|
#include <iostream>
|
|
#include <string_view>
|
|
|
|
using namespace units::isq;
|
|
|
|
|
|
// Some basic specs for the warship
|
|
struct Ship {
|
|
si::fps::length<si::fps::foot> length;
|
|
si::fps::length<si::fps::foot> draft;
|
|
si::fps::length<si::fps::foot> beam;
|
|
|
|
si::fps::speed<si::fps::foot_per_second> speed;
|
|
si::fps::mass<si::fps::pound> mass;
|
|
|
|
si::fps::length<si::fps::inch> mainGuns;
|
|
si::fps::mass<si::fps::pound> shellMass;
|
|
si::fps::speed<si::fps::foot_per_second> shellSpeed;
|
|
si::fps::power<si::fps::foot_poundal_per_second> power;
|
|
};
|
|
|
|
// Print 'a' in its current units and print its value cast to the units in each of Args
|
|
template<class... Args, units::Quantity Q>
|
|
auto fmt_line(const Q a)
|
|
{
|
|
return STD_FMT::format("{:22}", a) + (STD_FMT::format(",{:20}", units::quantity_cast<Args>(a)) + ...);
|
|
}
|
|
|
|
// Print the ship details in the units as defined in the Ship struct, in other si::imperial units, and in SI
|
|
void print_details(std::string_view description, const Ship& ship)
|
|
{
|
|
using namespace units::isq::si::fps::references;
|
|
const auto waterDensity = 62.4 * (lb / ft3);
|
|
std::cout << STD_FMT::format("{}\n", description);
|
|
std::cout << STD_FMT::format("{:20} : {}\n", "length",
|
|
fmt_line<si::fps::length<si::fps::yard>, si::length<si::metre>>(ship.length))
|
|
<< STD_FMT::format("{:20} : {}\n", "draft",
|
|
fmt_line<si::fps::length<si::fps::yard>, si::length<si::metre>>(ship.draft))
|
|
<< STD_FMT::format("{:20} : {}\n", "beam",
|
|
fmt_line<si::fps::length<si::fps::yard>, si::length<si::metre>>(ship.beam))
|
|
<< STD_FMT::format("{:20} : {}\n", "mass",
|
|
fmt_line<si::fps::mass<si::fps::long_ton>, si::mass<si::tonne>>(ship.mass))
|
|
<< STD_FMT::format(
|
|
"{:20} : {}\n", "speed",
|
|
fmt_line<si::speed<si::international::knot>, si::speed<si::kilometre_per_hour>>(ship.speed))
|
|
<< STD_FMT::format("{:20} : {}\n", "power",
|
|
fmt_line<si::fps::power<si::fps::horse_power>, si::power<si::kilowatt>>(ship.power))
|
|
<< STD_FMT::format("{:20} : {}\n", "main guns",
|
|
fmt_line<si::fps::length<si::fps::inch>, si::length<si::millimetre>>(ship.mainGuns))
|
|
<< STD_FMT::format("{:20} : {}\n", "fire shells weighing",
|
|
fmt_line<si::fps::mass<si::fps::long_ton>, si::mass<si::kilogram>>(ship.shellMass))
|
|
<< STD_FMT::format(
|
|
"{:20} : {}\n", "fire shells at",
|
|
fmt_line<si::fps::speed<si::fps::mile_per_hour>, si::speed<si::kilometre_per_hour>>(ship.shellSpeed))
|
|
<< STD_FMT::format("{:20} : {}\n", "volume underwater",
|
|
fmt_line<si::volume<si::cubic_metre>, si::volume<si::litre>>(ship.mass / waterDensity));
|
|
}
|
|
|
|
int main()
|
|
{
|
|
using namespace units::isq::si::references;
|
|
using namespace units::isq::si::fps::references;
|
|
using units::isq::si::fps::references::ft; // collides with si::femtotonne (alias unit of mass)
|
|
|
|
// KMS Bismark, using the units the Germans would use, taken from Wiki
|
|
auto bismark = Ship{.length{251. * m},
|
|
.draft{9.3 * m},
|
|
.beam{36 * m},
|
|
.speed{56 * (km / h)},
|
|
.mass{50'300 * t},
|
|
.mainGuns{380 * mm},
|
|
.shellMass{800 * kg},
|
|
.shellSpeed{820. * (m / s)},
|
|
.power{110.45 * kW}};
|
|
|
|
// USS Iowa, using units from the foot-pound-second system
|
|
auto iowa = Ship{.length{860. * ft},
|
|
.draft{37. * ft + 2. * in},
|
|
.beam{108. * ft + 2. * in},
|
|
.speed{33 * units::isq::si::international::references::kn},
|
|
.mass{57'540 * lton},
|
|
.mainGuns{16 * in},
|
|
.shellMass{2700 * lb},
|
|
.shellSpeed{2690. * (ft / s)},
|
|
.power{212'000 * hp}};
|
|
|
|
// HMS King George V, using units from the foot-pound-second system
|
|
auto kgv = Ship{.length{745.1 * ft},
|
|
.draft{33. * ft + 7.5 * in},
|
|
.beam{103.2 * ft + 2.5 * in},
|
|
.speed{28.3 * units::isq::si::international::references::kn},
|
|
.mass{42'245 * lton},
|
|
.mainGuns{14 * in},
|
|
.shellMass{1'590 * lb},
|
|
.shellSpeed{2483. * (ft / s)},
|
|
.power{110'000 * hp}};
|
|
|
|
print_details("KMS Bismark, defined in appropriate units from the SI system", bismark);
|
|
std::cout << "\n\n";
|
|
print_details("USS Iowa, defined in appropriate units foot-pound-second system", iowa);
|
|
std::cout << "\n\n";
|
|
print_details("HMS King George V, defined in appropriate units foot-pound-second system", kgv);
|
|
}
|