124 lines
4.2 KiB
C++
124 lines
4.2 KiB
C++
/////////////////////////////////////////////////////////////////////////////
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// examples/elf/tests/helloxx/hello++2.c
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//
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// Copyright (C) 2012 Gregory Nutt. All rights reserved.
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// Author: Gregory Nutt <gnutt@nuttx.org>
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions
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// are met:
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//
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// 1. Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in
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// the documentation and/or other materials provided with the
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// distribution.
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// 3. Neither the name NuttX nor the names of its contributors may be
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// used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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// FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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// COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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// INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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// BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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// OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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// AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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// LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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// ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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/////////////////////////////////////////////////////////////////////////////
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//
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// This is an another trivial version of "Hello, World" design. It illustrates
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//
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// - Building a C++ program to use the C library
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// - Basic class creation
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// - NO Streams
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// - NO Static constructor and destructors
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//
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/////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////////
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// Included Files
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/////////////////////////////////////////////////////////////////////////////
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#include <cstdio>
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/////////////////////////////////////////////////////////////////////////////
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// Classes
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/////////////////////////////////////////////////////////////////////////////
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class CThingSayer
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{
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const char *szWhatToSay;
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public:
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CThingSayer(void)
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{
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printf("CThingSayer::CThingSayer: I am!\n");
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szWhatToSay = (const char*)NULL;
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}
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~CThingSayer(void)
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{
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printf("CThingSayer::~CThingSayer: I cease to be\n");
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if (szWhatToSay)
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{
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printf("CThingSayer::~CThingSayer: I will never say '%s' again\n",
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szWhatToSay);
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}
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szWhatToSay = (const char*)NULL;
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}
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void Initialize(const char *czSayThis)
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{
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printf("CThingSayer::Initialize: When told, I will say '%s'\n",
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czSayThis);
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szWhatToSay = czSayThis;
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}
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void SayThing(void)
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{
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printf("CThingSayer::SayThing: I am now saying '%s'\n", szWhatToSay);
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}
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};
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/////////////////////////////////////////////////////////////////////////////
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// Public Functions
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/////////////////////////////////////////////////////////////////////////////
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int main(int argc, char **argv)
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{
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CThingSayer *MyThingSayer;
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printf("main: Started. Creating MyThingSayer\n");
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// Create an instance of the CThingSayer class
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// We should see the message from constructor, CThingSayer::CThingSayer(),
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MyThingSayer = new CThingSayer;
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printf("main: Created MyThingSayer=0x%08lx\n", (long)MyThingSayer);
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// Tell MyThingSayer that "Hello, World!" is the string to be said
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printf("main: Calling MyThingSayer->Initialize\n");;
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MyThingSayer->Initialize("Hello, World!");
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// Tell MyThingSayer to say the thing we told it to say
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printf("main: Calling MyThingSayer->SayThing\n");;
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MyThingSayer->SayThing();
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// We should see the message from the destructor,
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// CThingSayer::~CThingSayer(), AFTER we see the following
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printf("main: Destroying MyThingSayer\n");
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delete MyThingSayer;
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printf("main: Returning\n");;
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return 0;
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}
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