--- UnitTest.cpp	2004/05/14 18:54:07	9
+++ UnitTest.cpp	2004/05/14 20:57:49	10
@@ -21,6 +21,12 @@ bool contains(const Type& value, DoublyL
 	return false;
 }
 
+class VowelVisitor : public Visitor<string>
+{
+public:
+	void visit(const string& value) { if (value.find_first_of("aAeEiIoOuU") == 0) cout << value << '\n'; }
+};
+
 int main(int argc, char* argv[])
 {
 	cout.setf(ios_base::boolalpha);
@@ -68,5 +74,9 @@ int main(int argc, char* argv[])
 		if (itor->find_first_of("aAeEiIoOuU") == 0) cout << *itor << '\n';
 	}
 
+	VowelVisitor vowels;
+
+	words.accept(dynamic_cast<Visitor<string>*>(&vowels));
+
 	return 0;
 }