#include #include "GrayTileBehavior.h" using namespace std; GrayTileBehavior GrayTileBehavior::instance {"G"}; void GrayTileBehavior::update(Tile &) { } unique_ptr GrayTileBehavior::clone(Museum & museum) { auto instance = new GrayTileBehavior(); instance->museum = &museum; return unique_ptr(instance); }