Passing Array by Reference...

So I'm making a game (this isn't a game-related
question, though)... This may sound simple, but
I haven't been able to figure out how to do this.

I have a function that reads the information
from a bitmap, minus the palette. I'm trying to
write a function that would read only the
palette-information, and store it in a global-
array that is passed through the function. This
is what I tried (I'm still new), but it didn't
work...

Code:

BYTE g_GamePalette[256][3];

class Graphic{
 public:
  ReadImageInfo(char *name);
  ReadPalette(char *name, BYTE &palette[256][3]);
  ...
 private:
  ...
};

int main(){
  Graphic *image = new Graphic;
  image->ReadBitmapInfo{"bitmap.bmp");
  image->ReadPalette("bitmap.bmp", g_GamePalette[256][3]);

  /*********************************************
  *How would I pass the entire global array, by*
  *reference, though the ReadPalette() functio?*
  *********************************************/

  return 0;
}

Project: 13h Game.
Compiler: DJGPP.
Operating System: Windows 95.

Thanks a lot,
ethic.

Try;

Code:

ReadPalette(char *name, BYTE palette[][3])

and

Code:

image->ReadPalette("bitmap.bmp", g_GamePalette)

I think that works, but havent tested it.

Also, if the array is global, why are you passing it with the function?

arrays are always passed by reference anyway. When you pass an array in reality you are passing a constant pointer to the arrays first element.
ReadPalette(char *name, BYTE &palette[256][3]);
should be
ReadPalette(char *name, BYTE palette[256][3]);

>>Also, if the array is global, why are you passing it with the function?

I kind of want to make the class usable by other
people. If I do this, then they can name their
global palette anything they want... I think...
People will probably never use it, but doing
things this way may help me learn how to design
great graphic-engines (far into the future).

Also, I would be able to create multiple palettes
without having to write a seperate function for
each. This is good, too...

Sorry to bump this, but I'm still having trouble.

First I tried this, but it wouldn't compile. I
kept getting a error that said there wasn't a
matching function inside the GRAPHIC class (if
I understood it correctly)...

Code:

class GRAPHIC{
 public:
   bool ReadImageInfo(char *BitmapName);
   bool ReadPalette(char *BitmapName, BYTE Palette[256][3]);
 private:
  ...
};

BYTE MainGamePalette[256][3];

int main(){
  GRAPHIC *image = new GRAPHIC;
  image->ReadImageInfo("Bitmap.bmp");
  image->ReadPalette("Bitmap.bmp", MainGamePalette[256][3]);

  return 0;
}

Then I tried this (the next example). This compiled,
but wouldn't run. As soon as I tried to run the
game, I got a whole bunch of hex-things that I
don't understand, yet. It said something like:
"Exiting due to Signal SIGSEGV"...

I don't know if this error is related to my
palette-problem, or not. But it didn't happen
until after I changed my code (I'm still looking
at things)...

Code:

BYTE MainGamePalette[256][3];
int main(){
  ...
  image->ReadPalette("Bitmap.bmp", MainGamePalette);

 return 0;

}

Can anybody help? Is the second example correct
(because it compiles), and my problem lies
elswhere? Or is it completely wrong?

Thanks a lot,
ethic.

Okay, I'm dumb. Nevermind; I think the second
example is correct. I just got the thing to run.
Apparently when I commented-out the palette-reading
part of the Bitmap-reading function, I forgot
to skip the bitmap's palette-information.

Sorry.