x009.h

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#pragma once

#include "xerror.h"
#include "xmath.h"
#include "xphysics.h"
#include <iostream>

namespace nmx::apps::x009 {

class Pendulum
{
private:
    double _length, _mass;

public:
    Pendulum(double l, double m)
        : _length{ l }
        , _mass{ m } {
        //Länge und Masse sind positive Größen
        if (l <= 0 || m <= 0) {
            throw std::domain_error(__func__);
        }
    }

    double length() const { return _length; }

    double mass() const { return _mass; }
}; // Pendulum

inline void ex1() {
    using namespace gravitation;
    Pendulum p{ 1, 2 };
    //Schwingungsdauer für kleine Auslenkungen
    const double T0 = 2 * Math::PI * std::sqrt(p.length() / Earth::g);
    std::cout << p.length() << std::endl;
    std::cout << p.mass() << std::endl;
    std::cout << T0 << std::endl;
}

} // namespace nmx::apps::x009