Facade Structeral DP

#include
using namespace std;
class Engine
{
public:
    void Start() { cout<<"engine started"<};
class Headlights
{
public:
    void TurnOn() { cout<<"Headlight on"<};
//  That's your facade.
class Car
{
private:
    Engine engine;
    Headlights headlights;
public:
    void TurnIgnitionKeyOn()
    {
        headlights.TurnOn();
        engine.Start();
    }
};
int main(int argc, char *argv[])
{
    //  Consuming facade.
    Car car;
    car.TurnIgnitionKeyOn();
    return 0;
}