2009-06-17 00:08:59 +02:00
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
// examples/nxflat/tests/hello++/hello++3.c
|
|
|
|
//
|
|
|
|
// Copyright (C) 2009 Gregory Nutt. All rights reserved.
|
|
|
|
// Author: Gregory Nutt <spudmonkey@racsa.co.cr>
|
|
|
|
//
|
|
|
|
// 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 another trivial version of "Hello, World" design. It illustrates
|
|
|
|
//
|
|
|
|
// - Building a C++ program to use the C library and stdio
|
|
|
|
// - Basic class creation with virtual methods.
|
|
|
|
// - Static constructor and destructors (in main program only)
|
|
|
|
// - NO Streams
|
|
|
|
//
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Included Files
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
|
|
#include <cstdio>
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Classes
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
|
|
|
class CThingSayer
|
|
|
|
{
|
|
|
|
const char *szWhatToSay;
|
|
|
|
public:
|
|
|
|
CThingSayer(void);
|
|
|
|
virtual ~CThingSayer(void);
|
|
|
|
virtual void Initialize(const char *czSayThis);
|
|
|
|
virtual void SayThing(void);
|
|
|
|
};
|
|
|
|
|
|
|
|
// 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;
|
|
|
|
|
|
|
|
// These are implementations of the methods of the CThingSayer class
|
|
|
|
|
|
|
|
CThingSayer::CThingSayer(void)
|
|
|
|
{
|
|
|
|
printf("CThingSayer::CThingSayer: I am!\n");
|
2009-06-17 01:45:07 +02:00
|
|
|
szWhatToSay = (const char*)NULL;
|
2009-06-17 00:08:59 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
CThingSayer::~CThingSayer(void)
|
|
|
|
{
|
|
|
|
printf("CThingSayer::~CThingSayer: I cease to be\n");
|
|
|
|
if (szWhatToSay)
|
|
|
|
{
|
|
|
|
printf("CThingSayer::~CThingSayer: I will never say '%s' again\n",
|
|
|
|
szWhatToSay);
|
|
|
|
}
|
2009-06-17 01:45:07 +02:00
|
|
|
szWhatToSay = (const char*)NULL;
|
2009-06-17 00:08:59 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
void CThingSayer::Initialize(const char *czSayThis)
|
|
|
|
{
|
|
|
|
printf("CThingSayer::Initialize: When told, I will say '%s'\n",
|
|
|
|
czSayThis);
|
|
|
|
szWhatToSay = czSayThis;
|
|
|
|
}
|
|
|
|
|
|
|
|
void CThingSayer::SayThing(void)
|
|
|
|
{
|
|
|
|
printf("CThingSayer::SayThing: I am now saying '%s'\n", szWhatToSay);
|
|
|
|
}
|
|
|
|
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Public Functions
|
|
|
|
/////////////////////////////////////////////////////////////////////////////
|
|
|
|
|
2009-06-26 03:45:42 +02:00
|
|
|
int main(int argc, char **argv)
|
2009-06-17 00:08:59 +02:00
|
|
|
{
|
|
|
|
// 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
|
|
|
|
|
|
|
|
printf("main: Started. MyThingSayer should already exist\n");
|
|
|
|
|
|
|
|
// Tell MyThingSayer that "Hello, World!" is the string to be said
|
|
|
|
|
|
|
|
printf("main: Calling MyThingSayer.Initialize\n");;
|
|
|
|
MyThingSayer.Initialize("Hello, World!");
|
|
|
|
|
|
|
|
// Tell MyThingSayer to say the thing we told it to say
|
|
|
|
|
|
|
|
printf("main: Calling MyThingSayer.SayThing\n");;
|
|
|
|
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
|
|
|
|
|
|
|
|
printf("main: Returning. MyThingSayer should be destroyed\n");;
|
|
|
|
return 0;
|
|
|
|
}
|