//.HPP
class NOISE {
public:
	virtual double next() = 0;
};

class UNIFORM_NOISE: public NOISE {
	double L, R;
	std::default_random_engine generator;
  	std::uniform_real_distribution<double> distribution;

public:
  	UNIFORM_NOISE(double _L, double _R);
  	double next();
};

class NORMAL_NOISE: public NOISE {
	double m, s;
	std::default_random_engine generator;
  	std::normal_distribution<double> distribution;

public:
  	NORMAL_NOISE(double _m, double _s);
  	double next();
};

//.CPP
UNIFORM_NOISE::UNIFORM_NOISE(double _L, double _R): L(_L), R(_R) {
    distribution = std::uniform_real_distribution<double>(L, R);
}

double UNIFORM_NOISE::next() {
    return distribution(generator);
}

NORMAL_NOISE::NORMAL_NOISE(double _m, double _s): m(_m), s(_s) {
    distribution = std::normal_distribution<double>(m, s);
}

double NORMAL_NOISE::next() {
    std::cout <<"gening" <<std::endl;
    return distribution(generator);
}

//OTHER CLASS
std::vector< std::pair<cv::Point2d, cv::Point2d> > generate(const cv::Mat &rvec, const cv::Mat &tvec, int N, NOISE noise)


//ERROR
In file included from /home/other_file:1:0:
/home/other_file:35:117: error: cannot declare parameter ‘noise’ to be of abstract type ‘NOISE’
  std::vector< std::pair<cv::Point2d, cv::Point2d> > generate(const cv::Mat &rvec, const cv::Mat &tvec, int N, NOISE noise);