Biorhythms: Difference between revisions
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Age: 10717 days
Physical cycle: -27%
Emotional cycle: -100%</syntaxhighlight>
Intellectual cycle: -100%</syntaxhighlight>
=={{header|C++}}==
<syntaxhighlight lang="c++">
#include <chrono>
#include <cmath>
#include <cstdint>
#include <iostream>
#include <numbers>
#include <sstream>
#include <string>
#include <vector>
const double tau = 2 * std::numbers::pi;
const std::vector<std::string> cycles { "PHYSICAL", "EMOTIONAL", "MENTAL" };
const std::vector<std::int32_t> cycle_lengths { 23, 28, 33 };
const std::vector<std::vector<std::string>> descriptions { { "up and rising", "peak" },
{ "up but falling", "transition" },
{ "down and falling", "valley" },
{ "down but rising", "transition" } };
std::string to_string(const std::chrono::sys_days& sys_date) {
std::stringstream stream;
stream << sys_date;
std::string iso_date;
stream >> iso_date;
return iso_date;
}
std::chrono::sys_days create_date(const std::string& iso_date) {
const int year = std::stoi(iso_date.substr(0, 4));
const unsigned int month = std::stoi(iso_date.substr(5, 7));
const unsigned int day = std::stoi(iso_date.substr(8, 10));
std::chrono::year_month_day date{std::chrono::year{year}, std::chrono::month{month}, std::chrono::day{day}};
return std::chrono::sys_days(date);
}
void biorhythms(const std::vector<std::string>& date_pair) {
std::chrono::sys_days birth_date = create_date(date_pair[0]);
std::chrono::sys_days target_date = create_date(date_pair[1]);
int32_t days_between = ( target_date - birth_date ).count();
std::cout << "Birth date " << birth_date << ", Target date " << target_date << std::endl;
std::cout << "Days between: " << days_between << std::endl;
for ( int32_t i = 0; i < 3; ++i ) {
const int32_t cycle_length = cycle_lengths[i];
const int32_t position_in_cycle = days_between % cycle_length;
const int32_t quadrant_index = 4 * position_in_cycle / cycle_length;
const int32_t percentage = round(100 * sin(tau * position_in_cycle / cycle_length));
std::string description;
if ( percentage > 95 ) {
description = "peak";
} else if ( percentage < -95 ) {
description = "valley";
} else if ( abs(percentage) < 5 ) {
description = "critical transition";
} else {
const int32_t days_to_transition = ( cycle_length * ( quadrant_index + 1 ) / 4 ) - position_in_cycle;
std::chrono::sys_days transition_date = target_date + std::chrono::days{days_to_transition};
std::string trend = descriptions[quadrant_index][0];
std::string next_transition = descriptions[quadrant_index][1];
description = std::to_string(percentage) + "% (" + trend + ", next " + next_transition
+ " " + to_string(transition_date) + ")";
}
std::cout << cycles[i] << " day " << position_in_cycle << ": " << description << std::endl;
}
std::cout << std::endl;
}
int main() {
const std::vector<std::vector<std::string>> date_pairs = {
{ "1943-03-09", "1972-07-11" },
{ "1809-01-12", "1863-11-19" },
{ "1809-02-12", "1863-11-19" } };
for ( const std::vector<std::string>& date_pair : date_pairs ) {
biorhythms(date_pair);
}
}
</syntaxhighlight>
{{ out }}
<pre>
Birth date 1943-03-09, Target date 1972-07-11
Days between: 10717
PHYSICAL day 22: -27% (down but rising, next transition 1972-07-12)
EMOTIONAL day 21: valley
MENTAL day 25: valley
Birth date 1809-01-12, Target date 1863-11-19
Days between: 20034
PHYSICAL day 1: 27% (up and rising, next peak 1863-11-23)
EMOTIONAL day 14: critical transition
MENTAL day 3: 54% (up and rising, next peak 1863-11-24)
Birth date 1809-02-12, Target date 1863-11-19
Days between: 20003
PHYSICAL day 16: -94% (down and falling, next valley 1863-11-20)
EMOTIONAL day 11: 62% (up but falling, next transition 1863-11-22)
MENTAL day 5: 81% (up and rising, next peak 1863-11-22)
</pre>
=={{header|COBOL}}==
{{trans|Locomotive Basic}}
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