void Car addEngine Engine engine mEngine engine addPart engine void En

void Car::addEngine(Engine* engine)
{
  mEngine = engine;
  addPart(engine);
}

void EngineLada::init()
{
  mSparkPlugs = new SparkPlug[4];
 
  addPart(&mSparkPlugs[0]);
  addPart(&mSparkPlugs[1]);
  addPart(&mSparkPlugs[2]);
  addPart(&mSparkPlugs[3]);
 ...
}