Noob C++ question..

[Murloc992]

Sup, I have very stupid problem and I hope it's easier to solve it than I think.

Let's say I have a header full of random usefull functions, like code snippets header with a namespace.

Code: Select all

#ifndef SNIPS_H
#define SNIPS_H

include "Irrlicht.h"

namespace snips
{

void function_one(...)
{
...
}

irr::f32 function_two(...)
{
...
}

//and so on

}

#endif

Looks ok, but I am having really bad problems. I can't use it in any different .cpp files because I get already defined in obj *insert object name here*.obj error and actually don't know what to do now.. I have tried making header/cpp structure for the functions, only defines inside the header and declarations inside cpp, no luck.

Can somebody help me with this?

Thanks in advance!

[Acki]

I have tried making header/cpp structure for the functions, only defines inside the header and declarations inside cpp, no luck.

hmm, this should work...

you can also try making the functions static:

Code: Select all

#ifndef SNIPS_H
#define SNIPS_H

include "Irrlicht.h"

namespace snips
{

static void function_one(...)
{
...
}

static irr::f32 function_two(...)
{
...
}

//and so on

}

#endif

[Murloc992]

I have tried making header/cpp structure for the functions, only defines inside the header and declarations inside cpp, no luck.

hmm, this should work...

you can also try making the functions static:

Code: Select all

#ifndef SNIPS_H
#define SNIPS_H

include "Irrlicht.h"

namespace snips
{

static void function_one(...)
{
...
}

static irr::f32 function_two(...)
{
...
}

//and so on

}

#endif

Yeah, static worked Thanks!

[sudi]

lol
Header.h:

Code: Select all

#ifndef SNIPS_H
#define SNIPS_H

include "Irrlicht.h"

namespace snips
{

void function_one(...);

irr::f32 function_two(...);

//and so on

}

#endif

Header.cpp

Code: Select all

include "Header.h"

namespace snips
{

void function_one(...)
{
...
}

irr::f32 function_two(...)
{
...
}

}

[Murloc992]

lol
Header.h:

Code: Select all

#ifndef SNIPS_H
#define SNIPS_H

include "Irrlicht.h"

namespace snips
{

void function_one(...);

irr::f32 function_two(...);

//and so on

}

#endif

Header.cpp

Code: Select all

include "Header.h"

namespace snips
{

void function_one(...)
{
...
}

irr::f32 function_two(...)
{
...
}

}

I see you need to learn to read because I have stated that separate h/cpp doesn't work when used in separate cpp's while static does.

[Seven]

LOL! I actually laughed out loud

[Kalango]

I see you need to learn to read because I have stated that separate h/cpp doesn't work when used in separate cpp's while static does.

Well, there is a keyword named 'extern', that would be like:

Code: Select all

//CPP

extern void foo1()
{
}

and in the .h you would write the function definition
...or is it the opposite?
...you shold try...

PS: Oh yes, and i think it would work if you put like:

Code: Select all

void snip::foo1()
{
}

[hybrid]

No, if you put the declaration (even an empty one like {} ) into the .h file it won't work. Moreover, exten is redundant if you just put a declaration into the .h file. There's no reason why a separate .h/.cpp file would not work, it's just a matter of proper declaration/definition.

[Ulf]

The way Sudi showed should work.
Declaration in the .h file
Definition in the .cpp file

[randomMesh]

Organizing Code Files in C and C++

[Murloc992]

Ah, actually it was my mistake after all. When tried to do .h/.cpp I forgot to include namespace snips inside the cpp which lead to meant behaviour. So sorry and thanks Sudi..