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Add 'xo-unit/' from commit 'b531e382c2'

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git-subtree-dir: xo-unit
git-subtree-mainline: e9ee6992ca
git-subtree-split: b531e382c2
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Roland Conybeare 2025-05-10 21:29:43 -05:00
commit d1fa15f248
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36
xo-unit/example/ex6/ex6.cpp Normal file
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/** @file ex6.cpp **/
#include "xo/unit/quantity.hpp"
#include "xo/unit/quantity_iostream.hpp"
#include <iostream>
int
main () {
using xo::qty::quantity;
namespace q = xo::qty::qty;
using xo::flatstring;
/* 20% volatility over 360 days */
auto q1 = q::volatility_360d(0.2);
/* 10% volatility over 30 days */
auto q2 = q::volatility_30d(0.1);
/* 10% volatility per 30 days
* ~ (10% * sqrt(360/30)) volatility over 360 days
* ~ (10% * 3.4641)
* ~ 0.34641yr360^(-1/2)
*/
auto sum = q1 + q2;
auto prod = q1 * q2;
static_assert(sum.abbrev() == flatstring("yr360^(-1/2)"));
static_assert(prod.abbrev() == flatstring("yr360^-1"));
std::cerr << "q1: " << q1 << std::endl;
std::cerr << "q2: " << q2 << std::endl;
std::cerr << "q1+q2: " << sum << std::endl;
std::cerr << "q1*q2: " << prod << std::endl;
}
/** end ex6.cpp */