polymorphism.cpp

#include "catch.hpp"
#include <iostream>
 
class BaseStructure
{
public:
            void(*print)();
};

class One
{
public:
            static void print()
            {
                         std::cout << "one";
            }

            static BaseStructure create()
            {
                         BaseStructure s;
                         s.print = &One::print;
                         return s;
            }
};

class Two
{
public:
            static void print()
            {
                         std::cout << "two";
            }
            static BaseStructure create()
            {
                         BaseStructure s;
                         s.print = &Two::print;
                         return s;
            }
};

BaseStructure factory(int i)
{
            return i == 1 ? One::create() : Two::create();
}

TEST_CASE("Factory pattern test") {
            BaseStructure s = factory(2);
            s.print();
}