image.cpp

#include "image.h"
#include "matrix.h"
#include <vector>
#include <iostream>

class image {
  int main() {
		matrix *smallMatrix=new matrix;
	}
};

matrix.cpp

#include <iostream>
#include <stdlib.h>
#include <vector>

class matrix {
	public:
		matrix(int in_x, int in_y, std::vector<float> const& in_values) {
			x=in_x;
			y=in_y;
			values=in_values;
		}
		int getHeight() {
			return x;
		}
		int getWidth() {
			return y;
		}
	private:
		int x,y;
		std::vector<float> values;
};