C game engine support on C++

[Gio]

Hi, I have a relatively simple question: can you use a C game engine with a C++ IDE and the C++ Language? (I use Microsoft Visual C++ Express)? Specifically, I am interested in id Tech 2. Thanks!

[helios]

"Use" as in...?

[Albatross]

C++ is strictly a superset of C. You can use any code in C as C++ code and it should still work. At least, as far as I know...

-Albatross

[helios]

No, it isn't. It's perfectly possible to write valid C code that's invalid C++ code. That's partly why I asked what OP means by "use".

[Albatross]

Ah... so in that case I'd need an example. And please do not count "evil" features as invalid.

Because from the information section of this website:

C++ is backwards compatible with the C language. Any code written in C can easily be included in a C++ program without making any change.

-Albatross

[helios]

T *new=malloc(sizeof(T));

[Disch]

more examples:

int class;  // these work in C, but fail in C++ for obvious reasons
int template;
int typename;

//====
void AFunction();

int main()
{
  AFunction(1,2,3);  // this works in C
  return 0;
};

fun stuff

[helios]

Let's just stop this right here before it gets out of hand.

[Disch]

awwww =P

[Albatross]

I need to get rid of this caffeine dependency.

Or, I should start posting on this forum in the early mornings rather than late nights.

Now that I look, they're all obvious.

-Albatross

[Gio]

By "use" i mean write/edit games with it, or use/make a code template with it. (Like, by template, I mane you can select and "id Software 2" Project from the "new project" section to start with it imported w/ some code, like with Win32 or OGRE)

[helios]

You don't actually write any C or C++ to do that. You use the specialized language the engine provides to write scripts that will be interpreted at run time by the engine. The only case where you'd need to write C/++ is to write plugins, assuming the engine has that feature.
This is different from a rendering engine like OGRE because you interface with OGRE by linking with its library and calling functions. id Tech engines behave more like language interpreters.

I suppose you could use VC++ to write the scripts, but it won't give you any advantage over a simpler editor like, say, Notepad++. You won't get any code completion or anything like that, and there's nothing to compile.

[Gio]

Would there be a compile error because it is in C? Or would I have to avoid functions that are in C++ but not C when using it (or vice versa)?

[helios]

...What? No, you don't need to write any C or C++ to use the engine.