if the main class inherits from 2 classes with same virtual function but one of them is a pure virtual, will it just use the second one? No. C++ will not assume that you want that behavior. Or something else needs to be done? You must implement the function if you don’t want the derived … Read more
Your function is pure virtual, which means the method is virtual and not even implemented in the base class (= 0). So you have to delete the block after it. It has to be: virtual price(int Uchrg, int no_of_unt) = 0; without the { }. Virtual means, that classes that inherit from a base class … Read more
yes, a PVF can have parameters. virtual void playCard(Player enemyPlayer) = 0; here = 0 (is not assigning), Simply we are informing to compiler that function will be pure and does not having any body(where its declared, in that class), but it can have parameter. From the n4659 C++ standard A pure virtual function need … Read more
About question #1: yes, if you provide a factory method along with your ‘simple’ interface: class B { public: static B * create(); virtual void simple() = 0; }; in B’s implementation file (cpp): B *B::create() { return new D(); //or whatever ‘hidden’ implementation } About your #2: hiding functionality means simplification in the first … Read more