#ifndef ROCKET_H
#define ROCKET_H

class rocket {
	double _length;   //in meters
	double _v;        //velocity in meters per second
public:
	rocket(double init_length, double init_v)
		: _length {init_length}, _v {init_v} {}

	virtual ~rocket() {}

	virtual double length() const {return _length;}
	double v() const {return _v;}
};

#endif