text: #ifndef PHOTO_H
  #define PHOTO_H
  
  #include <iostream>
  #include <string>
  
  class Photo { // do not change this file.
  public:
      Photo(const std::string &, const std::string &, const std::string &, int);
  
      const std::string &getCategory() const;
      const std::string &getName() const;
      const std::string &getResolution() const;
      int getPrice() const;
  
      void setPrice(int);
  
      friend std::ostream &operator<<(std::ostream &, const Photo &);
  
  private:
      const std::string category;
      const std::string name;
      const std::string resolution;
      int price;
  };
  
  #endif //PHOTO_H
  