Passing pointer...reference...

This is a discussion on Passing pointer...reference... within the C++ Programming forums, part of the General Programming Boards category; First, here is the related code: Code: //Palette class. class PALETTE{ public: unsigned char red[256]; unsigned char green[256]; unsinged char ...

  1. #1
    Ecologist
    Join Date
    Aug 2001
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    Utah.
    Posts
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    Passing pointer...reference...

    First, here is the related code:

    Code:
    //Palette class.
    class PALETTE{
      public:  
        unsigned char red[256];
        unsigned char green[256];
        unsinged char blue[256];
    };
    //inside Bitmap class. Stores palette in passed palette class.
    void cBITMAP::ExtractPaletteAndStore(const PALETTE &palette);
    
    //inside graphics.h
    void SetPalette{const PALETTE *palette);
    This is what I want to do: Okay, the functions
    work fine if I declare a PALETTE variable. But,
    I want the palette to be on the freestore. I
    want to be able to pass the PALETTE pointer
    through the ExtractPaletteAndStore function.

    Code:
    //works.
    PALETTE L1Palette;
    L1Image->ExtractPaletteAndStore(L1Palette);
    SetPalette{&palette);
    
    //doesn't work, but this is what I want to do.
    PALETTE *L1Palette = new PALETTE;
    L1Image->ExtractPaletteAndStore(L1Palette);
    SetPalette{L1Palette);
    I want to be able to store the palette in the
    allocated memory. How would I go about doing this?
    Can I do this without chaning the function
    prototypes?

    DJGPP. Windows95. 13h Game.

    Thanks a lot,
    -ethic
    Staying away from General.

  2. #2
    Registered User
    Join Date
    Jul 2002
    Posts
    273
    Code:
    PALETTE *L1Palette = new PALETTE;
    L1Image->ExtractPaletteAndStore(*L1Palette);
    SetPalette{L1Palette);
    ya know? gotta dereference the pointer first!

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