Moved examples.

Added intrusive and non-intrusive versions of packing and unpacking examples.

example/cpp03/class_intrusive.cpp

@@ -0,0 +1,53 @@
+#include <string>
+#include <iostream>
+#include <iomanip>
+#include <sstream>
+#include <cassert>
+
+#include <msgpack.hpp>
+
+
+class my_class {
+public:
+    my_class() {} // When you want to convert from msgpack::object to my_class,
+                  // my_class should be default constractible.
+    my_class(std::string const& name, int age):name_(name), age_(age) {}
+
+    friend bool operator==(my_class const& lhs, my_class const& rhs) {
+        return lhs.name_ == rhs.name_ && lhs.age_ == rhs.age_;
+    }
+
+private:
+    std::string name_;
+    int age_;
+
+public:
+    MSGPACK_DEFINE(name_, age_);
+};
+
+void print(std::string const& buf) {
+    for (std::string::const_iterator it = buf.begin(), end = buf.end();
+         it != end;
+         ++it) {
+        std::cout
+            << std::setw(2)
+            << std::hex
+            << std::setfill('0')
+            << (static_cast<int>(*it) & 0xff)
+            << ' ';
+    }
+    std::cout << std::endl;
+}
+
+int main() {
+    my_class my("John Smith", 42);
+    std::stringstream ss;
+    msgpack::pack(ss, my);
+
+    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);
+}