Think of a car, you know how to drive a car, but a gas powered car operates differntly then an electric car. On both car you know how to make it accelerate, but on a gas based car when you hit the gas peddel you the car burn gas, but on an electric car it … Read more
You create an instance of B that is lets say “Bigger”, but the variable ‘a’ is converted into class A that is “Smaller” and contains the method print A. You did something similar to: A : IClass B : IClass The interface exposes some method that is in both A and B, and you to … Read more
While making a function virtual in c++ where do I have to write virtual keyword? In the function declaration, before the function name, and after any attribute specifiers, along with the other specifiers (including the type specifier for the function’s return type). The general syntax for a declaration is simple-declaration: decl-specifier-seq<opt> init-declarator-list<opt> ; attribute-specifier-seq decl-specifier-seq<opt> … Read more
I’m goign to take a shot at it because I recently tried to understand those and this is a good way to see if I did 🙂 because If you can’t explain something you haven’t really understood it 🙂 Casting is fairly simple. It means to pretty much convert a value or object of a … Read more
Here’s a version of your first example, that actually uses polymorphism: #include <iostream> #include <string> class shape { public: void setValues(int height_, int width_) { height = height_; width = width_; } virtual int area() = 0; // This is needed for polymorphism to work virtual std::string name() = 0; protected: int height; int width; … Read more