include/book_store/price.hh


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#ifndef PRICE_HH
#define PRICE_HH

#include <ostream>
#include <string>

namespace book_store::product::price {
class usd {
public:
  using price_type = double;

private:
  price_type _price;

public:
  usd() = default;
  usd(price_type price) : _price(price) {}
  usd(const std::string &price) : _price(std::stod(price)) {}

  auto operator=(const std::string &value) -> usd & {
    _price = std::stod(value);

    return *this;
  }

  friend auto operator<<(std::ostream &output_stream, const usd &price)
      -> std::ostream & {
    output_stream << price._price;

    return output_stream;
  }

  friend auto operator==(const usd &lhs, const usd &rhs) -> bool {
    return std::abs(lhs._price - rhs._price) < 0.0001;
  }
};
} // namespace book_store::product::price

#endif // PRICE_HH