how to create a 3d shaped cube and cylinder using c++ code and creating a stl file. code frame is : #include #include #include class Shape { public: }; class Cylinder : public Shape{ private: double r, h; int facets; public: Cylinder(double x, double y, double z, double r, double h, int facets) {} }; class Cube: public Shape { private: double size; public: Cube(double x, double y, double z, double size) : size(size) {} }; class CAD { private: vector shapes; public: }; //https://www.stratasysdirect.com/resources/how-to-prepare-stl-files/ //https://www.viewstl.com/ int main() { CAD c; c.add(new Cube(0,0,0, 5)); c.add(new Cylinder(100,0,0, 3, 10, 10)); c.write("test.stl"); }