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POA basic understanding of C++ header files
 

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    <p>I have a theory question rather than an error report.</p> <p>I'm a rookie C++ programmer, trying to promote that away</p> <p>Using the VC++ VS2008 compiler</p> <p>I am often finding myself wondering WHY I want to take some actions in header files.</p> <p>For example look at this code block:</p> <pre><code>#include "DrawScene.h" #include "Camera.h" #include "Player.h" #include "Grid.h" #include "InputHandler.h" #include "GameState.h" class Controller { public: private: public: Controller(); ~Controller(){} void Update(); private: }; </code></pre> <p>And the hooked up CPP file , controller.cpp along with it</p> <pre><code>#include "stdafx.h" #include "glut.h" #include "Controller.h" #include &lt;iostream&gt; Grid* grid_ptr = new Grid(); InputHandler* inputHandler_ptr = new InputHandler(); DrawScene* drawScene_ptr = new DrawScene(); GameState* gameState_ptr = new GameState(); Controller::Controller() { } void Controller::Update() { } </code></pre> <p>What is a good way to decide which includes go where? So far I've been going with the " whatever works" method but I find it somewhat unprofessional. </p> <p>Now even though you can say my code has X syntax errors and design flaws, please do, but the focal point I would appreciate that information remains on the use of .h VS .cpp files.</p> <p>Why is there even such a design? And what are the pits and traps to always be treading lightly around when making any kind of OOP based C++ program?</p> <p>What sparked this question for me btw was that I wanted to notify the reader of the header file there will be objects stored in the controller but assigning these uninitialized objects seemed impossible without making them static. </p> <p>Note: I stem from C# --> C++ , might help to know. That's kind of my perspective on code at this point.</p> <p>Thank you in advance for you efforts!</p> <p>EDIT: 26/08/2010 18:16</p> <p>So the build time is the essence of good includes. Is there more to be cautious about?</p>
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    1. COMy own month-long take on separate compilation, told in 5 minutes: http://stackoverflow.com/questions/2037880/how-can-i-avoid-including-class-implementation-files/2038233#2038233
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    2. CODon't necessarily worry about compile times becoming a problem until they *are* a problem: I will put *everything* in a header to begin, and move things out later.
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