//info link in the comments #include #include #include #include enum class Difficulty { EASY = 1, CASUAL, HARD }; //hpp.file //the interface for the class class Riddler { private: //forward declaration of the implementation class class RiddlerImpl; //pointer to said class std::unique_ptr< RiddlerImpl > pImpl; public: //public methods void greet() const; void giveRiddle() const; Riddler(std::string, Difficulty); }; //cpp.file //everything else is outsorced into another class class Riddler::RiddlerImpl { private: std::string name; Difficulty difficulty; public: RiddlerImpl(std::string, Difficulty); void greet() const; void giveRiddle() const; }; Riddler::RiddlerImpl::RiddlerImpl(std::string name, Difficulty difficulty) :name(name), difficulty(difficulty) {} void Riddler::RiddlerImpl::greet() const { std::cout << "Welcome to my world of games!\n"; std::cout << "I'm " << this->name << ", the king of this world!\n"; std::cout << "Let's have some fun together, shall we?\n\n"; } void Riddler::RiddlerImpl::giveRiddle() const { std::cout << "A riddle? Hihi! Sure... Here we go!\n"; std::cout << "Tell me, what is " << 1 + rand() % (static_cast(this->difficulty) * 10) << " * " << 1 + rand() % (static_cast(this->difficulty) * 10) << "?"; } Riddler::Riddler(std::string name, Difficulty diff) :pImpl{std::make_unique(name, diff)} {} void Riddler::greet() const { pImpl->greet(); } void Riddler::giveRiddle() const { pImpl->giveRiddle(); } //main.file int main() { srand(static_cast(time(nullptr))); Riddler* r = new Riddler("Tet", Difficulty::HARD); r->greet(); r->giveRiddle(); return 0; }

pImpl Idiom