#include "all_includes.hh" Triangle::Triangle(Vertex a, Vertex b, Vertex c): a(a), b(b), c(c) { std::cout << this << std::endl; } std::ostream& operator<<(std::ostream& os, const Triangle& t) { return os << "Triangle " << t.a << "--" << t.b << "--" << t.c << "-- cycle"; }