From:	Erik Max Francis <max AT alcyone DOT com>
Newsgroups:	comp.os.msdos.djgpp
Subject:	Re: Dynamically declaring 2-d arrays
Date:	Sat, 14 Feb 1998 12:06:50 -0800
Organization:	Alcyone Systems
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Paul Derbyshire wrote:

> My dynamic 2D array recipe:
> 
> int (*foo)[ysize] = malloc (xsize*ysize*sizeof(int));

This only wroks if ysize is not a variable, i.e., it is not truly
dynamic.

gcc has extensions to allow variable-sized arrays, but they are
gcc-specific.

> As for C++, it ought to be possible (at least with gnu) to use
> 
> foo = new int[y][x];
> /* ... */
> delete [] foo;
> 
> (is it?)

Same restriction applies here.

In general, it's a bad idea to use any compiler extensions unless you
have a _very_ good reason, or know for a fact you'll never have to/want
to port the program to another compiler/platform.

-- 
         Erik Max Francis, &tSftDotIotE / mailto:max AT alcyone DOT com
                       Alcyone Systems / http://www.alcyone.com/max/
  San Jose, California, United States / icbm://+37.20.07/-121.53.38
                                     \
                       "Life may be / the product of imperfections."
                                   / (Marclo Gleiser)

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