#include using namespace std; enum enmTransportMode { Road = 0, Rail = 1, Air = 2 }; class clsTravel { public: clsTravel() { cout << "Base constructor (clsTravel) called" << endl; } virtual ~clsTravel() { cout << "Base destructor (clsTravel) called" << endl; } virtual void display() { cout << "Welcome to Travel portal" << endl; } static clsTravel* GetTravelObject(enmTransportMode); }; class clsByRoad : public clsTravel { public: clsByRoad() { cout << "Derived constructor (clsByRoad) called" << endl; } virtual ~clsByRoad() { cout << "Derived destructor (clsByRoad) called" << endl; } void display() { cout << "------>Welcome to road transportation mode.." << endl; } }; class clsByRail : public clsTravel { public: clsByRail() { cout << "Derived constructor (clsByRail) called" << endl; } virtual ~clsByRail() { cout << "Derived destructor (clsByRail) called" << endl; } void display() { cout << "------>Welcome to rail transportation mode.." << endl; } }; class clsByAir : public clsTravel { public: clsByAir() { cout << "Derived constructor (clsByAir) called" << endl; } virtual ~clsByAir() { cout << "Derived destructor (clsByAir) called" << endl; } void display() { cout << "------>Welcome to air transportation mode.." << endl; } }; clsTravel* clsTravel::GetTravelObject(enmTransportMode ienmTransportMode) { if(ienmTransportMode == Road) return new clsByRoad(); else if(ienmTransportMode == Rail) return new clsByRail(); else if(ienmTransportMode == Air) return new clsByAir(); return new clsTravel(); } int main() { //Road clsTravel* p1 = clsTravel::GetTravelObject(Road); p1->display(); delete p1; p1 = nullptr; cout << endl << endl; //Rail clsTravel* p2 = clsTravel::GetTravelObject(Rail); p2->display(); delete p2; p2 = nullptr; cout << endl << endl; //Air clsTravel* p3 = clsTravel::GetTravelObject(Air); p3->display(); delete p3; p3 = nullptr; cout << endl << endl; return 0; }

FactoryPattern_1