thevisitor.cpp

// cpp file
TheVisitor::TheVisitor()
{
	depth = 0;
}

void TheVisitor::VisitElement( Element* thisele )
{
	list<Attr*> attrcopy = thisele->Copyattrs();
	list<Node*> nodecopy = thisele->Copynodes();

	cout << "<" << thisele->getName();
	// print attributes
	for (list<Attr*>::iterator i = attrcopy.begin(); i != attrcopy.end(); i++)
	{
		(*i)->Accept(*this);
	}

	// print inner elements
	if( nodecopy.empty() )
	{
		cout << " />" << endl;
	}
	else
	{
		cout << ">" << endl;
		for ( list<Node*>::iterator n = nodecopy.begin(); n != nodecopy.end(); n++)
		{
			depth++;
			(*n)->Accept(*this);
			depth--;
		}
		printtab(depth);
		cout << "</" << thisele->getName() << ">" << endl;

	}
}

void TheVisitor::printtab()
	for(int i = 0; i < depth; i++)
	{
		cout << "\t";
	}
}

thevisitor.h

// in the header file
class TheVisitor : public Visitor
{
	// other stuff here
	private:
		int depth;
		void printtab();
}