Thread: Pointer to Structure

If I have the following struct:

struct tagPalette
{
unsigned int entry[256];
};

tagPalette Palette1;
tagPalette *pPalette1; //Pointer to structure

pPalette1 = &Palette1; //Point to Palette1

How do I pass pPalette in a function, is it:

Funct(pPalette1, pixel);

Where the function is:
Funct1(tagPalette PaletteNum, int Pixel)
{
a = PaletteNum->entry[pixel];
}

You can pass the address of Palette1 when calling the function:

Code:

struct tagPalette 
{ 
	unsigned int entry[256]; 
}; 

void Funct1(tagPalette *PaletteNum, int Pixel) 
{ 
	printf("%d\n", PaletteNum->entry[Pixel]);
	PaletteNum->entry[Pixel] = 20;
}

int main()
{
	tagPalette Palette1; 

	Palette1.entry[0] = 10;
	Funct1(&Palette1, 0);
	printf("%d\n", Palette1.entry[0]);
	return 0;
}

B.t.w.

Avoid global vars if you can
// is C++ comment, use /* ... */

Just a little correction. Using // for comments is also valid according to the latest C standard.

Originally posted by Shiro
Just a little correction. Using // for comments is also valid according to the latest C standard.

But it's not supported by most C compilers....

Shiro,

Can you tell me where I can find the latest C standard?

Many thanks,
Monster

Originally posted by Prelude
>Can you tell me where I can find the latest C standard?
www.ansi.org

-Prelude

I know that site but does the ANSI C standard has a number (like ANSI X9.19) that I can search on.

B.t.w. Do you have to pay for this standard?

The number of the latest standard is C99 or ISO/IEC 9899:1999. Unfortunately the standard is not free.

Actual proper copies do cost $$$

But a free copy is here - it's the last public draft prior to the standard, so its going to be close enough for most people who are not writing compilers.