/// @file
/// @brief Task1: simple hierarchy to be used in task1.main.cpp

#pragma once

#include <numbers> // std::numbers::pi

namespace task1 {

struct Interface {
  double virtual area() const = 0;
  virtual ~Interface() {}
};

struct Circle : Interface {
  Circle(double radius) : radius(radius) {}
  double radius;
  double virtual area() const final override { return std::numbers::pi * radius * radius; }
};

struct Square : Interface {
  Square(double length) : length(length) {}
  double length;
  double virtual area() const final override { return length * length; }
};

} // namespace task1