diff --git a/example/cpp03/class_intrusive.cpp b/example/cpp03/class_intrusive.cpp
index a5bb0819..64a3956e 100644
--- a/example/cpp03/class_intrusive.cpp
+++ b/example/cpp03/class_intrusive.cpp
@@ -54,20 +54,30 @@ void print(std::string const& buf) {
             << (static_cast<int>(*it) & 0xff)
             << ' ';
     }
-    std::cout << std::endl;
+    std::cout << std::dec << std::endl;
 }
 
 #include <msgpack.hpp>
 
 int main() {
-    my_class my("John Smith", 42);
-    std::stringstream ss;
-    msgpack::pack(ss, my);
+    {   // pack, unpack
+        my_class my("John Smith", 42);
+        std::stringstream ss;
+        msgpack::pack(ss, my);
 
-    print(ss.str());
+        print(ss.str());
 
-    msgpack::unpacked unp;
-    msgpack::unpack(unp, ss.str().data(), ss.str().size());
-    msgpack::object obj = unp.get();
-    assert(obj.as<my_class>() == my);
+        msgpack::unpacked unp;
+        msgpack::unpack(unp, ss.str().data(), ss.str().size());
+        msgpack::object obj = unp.get();
+        std::cout << obj << std::endl;
+        assert(obj.as<my_class>() == my);
+    }
+    {   // create object with zone
+        my_class my("John Smith", 42);
+        msgpack::zone z;
+        msgpack::object obj(my, z);
+        std::cout << obj << std::endl;
+        assert(obj.as<my_class>() == my);
+    }
 }
diff --git a/example/cpp03/class_non_intrusive.cpp b/example/cpp03/class_non_intrusive.cpp
index 57f10890..1168b484 100644
--- a/example/cpp03/class_non_intrusive.cpp
+++ b/example/cpp03/class_non_intrusive.cpp
@@ -37,6 +37,8 @@ object const& operator>> (msgpack::object const& o, my_class& v);
 template <typename Stream>
 packer<Stream>& operator<< (msgpack::packer<Stream>& o, my_class const& v);
 
+void operator<< (msgpack::object::with_zone& o, my_class const& v);
+
 } // MSGPACK_API_VERSION_NAMESPACE(MSGPACK_DEFAULT_API_NS)
 } // namespace msgpack
 
@@ -87,6 +89,14 @@ inline packer<Stream>& operator<< (msgpack::packer<Stream>& o, my_class const& v
     return o;
 }
 
+inline void operator<< (msgpack::object::with_zone& o, my_class const& v) {
+    o.type = type::ARRAY;
+    o.via.array.size = 2;
+    o.via.array.ptr = static_cast<object*>(o.zone.allocate_align(sizeof(object) * o.via.array.size));
+    o.via.array.ptr[0] = msgpack::object(v.get_name(), o.zone);
+    o.via.array.ptr[1] = msgpack::object(v.get_age(), o.zone);
+}
+
 } // MSGPACK_API_VERSION_NAMESPACE(MSGPACK_DEFAULT_API_NS)
 } // namespace msgpack
 
@@ -102,18 +112,28 @@ void print(std::string const& buf) {
             << (static_cast<int>(*it) & 0xff)
             << ' ';
     }
-    std::cout << std::endl;
+    std::cout << std::dec << std::endl;
 }
 
 int main() {
-    my_class my("John Smith", 42);
-    std::stringstream ss;
-    msgpack::pack(ss, my);
+    {   // pack, unpack
+        my_class my("John Smith", 42);
+        std::stringstream ss;
+        msgpack::pack(ss, my);
 
-    print(ss.str());
+        print(ss.str());
 
-    msgpack::unpacked unp;
-    msgpack::unpack(unp, ss.str().data(), ss.str().size());
-    msgpack::object obj = unp.get();
-    assert(obj.as<my_class>() == my);
+        msgpack::unpacked unp;
+        msgpack::unpack(unp, ss.str().data(), ss.str().size());
+        msgpack::object obj = unp.get();
+        std::cout << obj << std::endl;
+        assert(obj.as<my_class>() == my);
+    }
+    {   // create object with zone
+        my_class my("John Smith", 42);
+        msgpack::zone z;
+        msgpack::object obj(my, z);
+        std::cout << obj << std::endl;
+        assert(obj.as<my_class>() == my);
+    }
 }
diff --git a/example/cpp03/enum.cpp b/example/cpp03/enum.cpp
new file mode 100644
index 00000000..c87dd516
--- /dev/null
+++ b/example/cpp03/enum.cpp
@@ -0,0 +1,68 @@
+// MessagePack for C++ example
+//
+// Copyright (C) 2015 KONDO Takatoshi
+//
+//    Licensed under the Apache License, Version 2.0 (the "License");
+//    you may not use this file except in compliance with the License.
+//    You may obtain a copy of the License at
+//
+//        http://www.apache.org/licenses/LICENSE-2.0
+//
+//    Unless required by applicable law or agreed to in writing, software
+//    distributed under the License is distributed on an "AS IS" BASIS,
+//    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+//    See the License for the specific language governing permissions and
+//    limitations under the License.
+//
+
+#include <msgpack_fwd.hpp>
+#include <sstream>
+#include <iostream>
+#include <cassert>
+
+enum my_enum {
+    elem1,
+    elem2,
+    elem3
+};
+
+MSGPACK_ADD_ENUM(my_enum);
+
+#include <msgpack.hpp>
+
+int main(void)
+{
+    {   // pack, unpack
+        std::stringstream sbuf;
+        msgpack::pack(sbuf, elem1);
+        msgpack::pack(sbuf, elem2);
+        my_enum e3 = elem3;
+        msgpack::pack(sbuf, e3);
+
+        msgpack::unpacked result;
+        std::size_t off = 0;
+
+        msgpack::unpack(result, sbuf.str().data(), sbuf.str().size(), off);
+        std::cout << result.get().as<my_enum>() << std::endl;
+        assert(result.get().as<my_enum>() == elem1);
+
+        msgpack::unpack(result, sbuf.str().data(), sbuf.str().size(), off);
+        std::cout << result.get().as<my_enum>() << std::endl;
+        assert(result.get().as<my_enum>() == elem2);
+
+        msgpack::unpack(result, sbuf.str().data(), sbuf.str().size(), off);
+        std::cout << result.get().as<my_enum>() << std::endl;
+        assert(result.get().as<my_enum>() == elem3);
+    }
+    {   // create object without zone
+        msgpack::object obj(elem2);
+        std::cout << obj.as<my_enum>() << std::endl;
+        assert(obj.as<my_enum>() == elem2);
+    }
+    {   // create object with zone
+        msgpack::zone z;
+        msgpack::object objz(elem3, z);
+        std::cout << objz.as<my_enum>() << std::endl;
+        assert(objz.as<my_enum>() == elem3);
+    }
+}