May 02, 2009 This is where header files come in. Header files allow you to make the interface (in this case, the class MyClass) visible to other.cpp files, while keeping the implementation (in this case, MyClass's member function bodies) in its own.cpp file. Dec 01, 2013 In the.cpp file I am trying to include my header file but I am getting the message 'no such file or directory. I believe it is because I am not telling the IDE where the file is but I am unsure how to do that. Am I doing it correctly and how do I tell the IDE where to find the.h file?.My IDE is Dev C.
C standard library header files.; 2 minutes to read +1; In this article. Header files for the C standard library and extensions, by category. Headers by category. 11 Added in the C11 standard. 14 Added in the C14 standard. 17 Added in the C17 standard. 20 Added in the draft C.
g++ main.cpp file.c file.h Only main.cpp and file.cpp will be compiled. A side effect of this is that header extensions are arbitrary. |
I wasn't sure that was the case. iirc, you could compile headers in VS. I haven't tried it since i switched to CodeBlocks+GCC. But that's a valid point.
How To Include Header File In Dev C Download
About section 7 |
Oh crap! That's what i get for not testing enough. You're totally right, forward declaring works fine. Only problem happens if its implicitly inlined, but that's another matter.
Finally, about templates, I'd say it's better practice to put the template definition in the class declaration. |
Well -- I'm not a big fan of putting implementation in the class itself (unless it's a really small get() function or some other kind of 1-liner). I guess with templates it's alright because any dependencies can be forward declared and included after the class body (at least I think so, I'd have to actually test that).
There are other considerations, too, though. Like if the template class is exceedingly large and you want to ease compile time (though it would have to be pretty freaking big to make a difference)
Anyway overall I agree. I just included that bit out of completeness. I figured I should focus more on the instantiating method since everybody knows how to do the inlining method. But really -- the more I think about it, the more I think that should belong in another article (like one specifically talking about templates).
In response to that, I've decided to cut sections 7 and 9 completely, and touch up a few related things. I'll edit the posts once I get it straightened out on my local copy.