/// @file
/// @brief task B
/// g++ -std=c++20 taskB.cpp -o taskB && ./taskB

#include <iostream>

namespace one {

struct Particle {
  double vx; // velocity in x-direction
  double vy; // velocity in y-direction
  double m;  // mass

  /// @todo implement the following member functions:
  ///     - energy(): returns the kinetic energy of the particle (formula, see main.ipynb)
  ///     - print(): prints the values of the member variables to the console
  double energy() {
    return 0.5 * m * (vx * vx + vy * vy);
  }

  void print() {
    std::cout << "vx: " << vx << ", vy: " << vy << ", m: " << m << std::endl;
  }
};

} // end namespace one

namespace two {
/// @todo implement a class with the following properties:
///     - private member variables vx, vy, m
///     - constructor with three parameters (for the three member variables)
///     - set(): function to change the values of all three member variables
///     - get(): returns the values of the member variables in a tuple
///     - energy(): returns the kinetic energy of the particle (formula, see main.ipynb)
///     - print(): prints the values of the member variables to the console

class Particle {
  double vx; // velocity in x-direction
  double vy; // velocity in y-direction
  double m;  // mass

  void set(double vx, double vy, double m) {
    this->vx = vx;
    this->vy = vy;
    this->m = m;
  }

    std::tuple<double, double, double> get() {
        return std::make_tuple(vx, vy, m);
    }

double energy() {
        return 0.5 * m * (vx * vx + vy * vy);
    }

void print() {
        std::cout << "vx: " << vx << ", vy: " << vy << ", m: " << m << std::endl;
    }

};

} // end namespace two

int main() {

  /// @todo create objects from both classes and use their member functions
    one::Particle p1;
    p1.vx = 1.0;
    p1.vy = 2.0;
    p1.m = 3.0;
    p1.print();
    std::cout << "energy: " << p1.energy() << std::endl;


  return 0;
}