#include <iostream>
using namespace std ;

class engine
{
	public:
	int cyclinders ;
	engine()
	{
	}
	engine(int cyclindersP )
	{
		cyclinders = cyclindersP ;
	}
};

class car
{
	public:
	const int someConstant ;
	int& someReference ;
	engine engineObj ;

	car(int x1, int x2 , int x3 ) :
	someConstant(x1) , someReference(x2),
	engineObj( x3 )
	{
		//someConstant = x1 ;
		// engineObj( x3) ;
		//someReference = 10 ;
	}
};

int main()
{
	car carObject( 1 , 2 , 6 ) ;
	cout << carObject.engineObj.cyclinders << endl ;
	return(0) ;
}