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+/////////////////////////////////////////////////////////////////////////////
+// examples/elf/tests/hello++/hello++4.c
+//
+// Copyright (C) 2012 Gregory Nutt. All rights reserved.
+// Author: Gregory Nutt <gnutt@nuttx.org>
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+//
+// 1. Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// 2. Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in
+// the documentation and/or other materials provided with the
+// distribution.
+// 3. Neither the name NuttX nor the names of its contributors may be
+// used to endorse or promote products derived from this software
+// without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+/////////////////////////////////////////////////////////////////////////////
+//
+// This is an excessively complex version of "Hello, World" design to
+// illustrate some basic properties of C++:
+//
+// - Building a C++ program
+// - Streams / statically linked libstdc++
+// - Static constructor and destructors (in main program only)
+//
+/////////////////////////////////////////////////////////////////////////////
+
+/////////////////////////////////////////////////////////////////////////////
+// Included Files
+/////////////////////////////////////////////////////////////////////////////
+
+#include <cstdio>
+#include <iostream>
+
+#ifndef NULL
+# define NULL ((void*)0L)
+#endif
+
+/////////////////////////////////////////////////////////////////////////////
+// Classes
+/////////////////////////////////////////////////////////////////////////////
+
+using namespace std;
+
+// A hello world sayer class
+
+class CThingSayer
+{
+ const char *szWhatToSay;
+public:
+ CThingSayer(void);
+ virtual ~CThingSayer(void);
+ virtual void Initialize(const char *czSayThis);
+ virtual void SayThing(void);
+};
+
+/////////////////////////////////////////////////////////////////////////////
+// Private Data
+/////////////////////////////////////////////////////////////////////////////
+
+// A static instance of the CThingSayer class. This instance MUST
+// be constructed by the system BEFORE the program is started at
+// main() and must be destructed by the system AFTER the main()
+// returns to the system
+
+static CThingSayer MyThingSayer;
+
+/////////////////////////////////////////////////////////////////////////////
+// Method Implementations
+/////////////////////////////////////////////////////////////////////////////
+
+// These are implementations of the methods of the CThingSayer class
+
+CThingSayer::CThingSayer(void)
+{
+ cout << "CThingSayer::CThingSayer: I am!" << endl;
+ szWhatToSay = (const char*)NULL;
+}
+
+CThingSayer::~CThingSayer(void)
+{
+ cout << "CThingSayer::~CThingSayer: I cease to be" << endl;
+ if (szWhatToSay)
+ {
+ cout << "CThingSayer::~CThingSayer: I will never say '"
+ << szWhatToSay << "' again" << endl;
+ }
+ szWhatToSay = (const char*)NULL;
+}
+
+void CThingSayer::Initialize(const char *czSayThis)
+{
+ cout << "CThingSayer::Initialize: When told, I will say '"
+ << czSayThis << "'" << endl;
+ szWhatToSay = czSayThis;
+}
+
+void CThingSayer::SayThing(void)
+{
+ cout << "CThingSayer::SayThing: I am now saying '"
+ << szWhatToSay << "'" << endl;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+// Public Functions
+/////////////////////////////////////////////////////////////////////////////
+
+int main(int argc, char **argv)
+{
+ // We should see the message from constructor, CThingSayer::CThingSayer(),
+ // BEFORE we see the following messages. That is proof that the
+ // C++ static initializer is working
+
+ cout << "main: Started" << endl;
+
+ // Tell MyThingSayer that "Hello, World!" is the string to be said
+
+ cout << "main: Calling MyThingSayer.Initialize" << endl;
+ MyThingSayer.Initialize("Hello, World!");
+
+ // Tell MyThingSayer to say the thing we told it to say
+
+ cout << "main: Calling MyThingSayer.SayThing" << endl;
+ MyThingSayer.SayThing();
+
+ // We are finished, return. We should see the message from the
+ // destructor, CThingSayer::~CThingSayer(), AFTER we see the following
+ // message. That is proof that the C++ static destructor logic
+ // is working
+
+ cout << "main: Returning" << endl;
+ return 0;
+}