A Template for implementing factory method in C++

factoryPattern.cpp

// A Template for implementing factory method
#include <iostream>
using namespace std;


// Declare the available types that can be passed to the factory
enum robotType {R_Bipedal,   R_Drone,  R_Rover};

//  Superclass
class Robot{
public:
    virtual void printRobot() = 0;
    static Robot* factory(robotType type);
};

//  Sub-classes
class Bipedal: public Robot{
public:
    void printRobot(){ cout << "I am a robot that walks" << endl; }
};

class Drone: public Robot{
public:
    void printRobot(){ cout << "I am a robot that can fly" << endl; }
};

class Rover: public Robot{
public:
    void printRobot(){ cout << "I am a rover like the one on mars" << endl; }
};

//  This is the factory method
Robot* Robot::factory(robotType type) {
    if(type == R_Bipedal)
        return new Bipedal();
    else if(type == R_Drone)
        return new Drone();
    else if(type == R_Rover)
        return new Rover();
    else
        return NULL;
}