Using the factory method

A factory is essentially a warehouse for creating objects of other types. In a factory method design pattern, the creation of a new type of object, such as an enemy or a building, happens from an interface and the subclass decides which class it needs to instantiate. This is also a commonly used pattern in games and can be quite useful.

Getting ready

You need to have a working copy of Visual Studio installed on your Windows machine.

How to do it…

In this recipe, we will find out how easy it is to write a factory method design pattern:

1. Open Visual Studio.

2. Create a new C++ project.

3. Select a Win32 console application.

4. Add a source file called Source.cpp.

5. Add the following lines of code to it:

   #include <iostream>
   #include <conio.h>
   #include <vector>
   
   using namespace std;
   
   class IBuilding
   {
   public:
     virtual void TotalHealth() = 0;
   };
   
   class Barracks : public IBuilding
   {
   public:
     void TotalHealth()
     {
       cout << "Health of Barrack is :" << 100;...