Define a Pure Virtual Method

define-pure-virtual.cpp

#include <iostream>

using namespace std;

class Abstract
{
    public:
        virtual void DoStuff() = 0;
};

void Abstract::DoStuff()
{
    cout << "You can do stuff" << endl;
}

class Concrete : public Abstract
{
    public:
        void DoStuff()
        {
            Abstract::DoStuff();
        }
};

int main()
{
    Concrete c;
    //Abstract a; // Won't compile
    c.DoStuff();
    return 0;
}

#Define a Pure Virtual Method

Today I learned that C++ doesn't care if you define a pure virtual method and call it from a child class. It's still considered an abstract class, so you can't instantiate it directly