Path: utzoo!attcan!uunet!lll-winken!lll-tis!helios.ee.lbl.gov!pasteur!agate!saturn!skinner
From: skinner@saturn.ucsc.edu (Robert Skinner)
Newsgroups: comp.lang.c++
Subject: matrix types and [] overloading
Keywords: matrix, [] overloading
Message-ID: <5181@saturn.ucsc.edu>
Date: 19 Oct 88 17:07:37 GMT
Organization: U.C. Santa Cruz, CIS/CE.
Lines: 18

(I know that this subject was discussed a few weeks ago, but I didn't
pay much attention then.  Now I need to know.  Sorry for the repetition.)

I'm constructing a general 2d Matrix object for a class I'm now taking
on matrix computations.  It would be nice if I could
overload the [] operator to allow something like a[1][2], but I
understand that is not possible.  

Another option is to overload the () operator to provide array indexing:

	virtual float	*operator()( int i, int j ) 
				{ return data + i*cols + j; }

This works, but it proliferates lots of *'s in the code, making it
less readable.  Is there something I'm missing that was explained by a 
previous poster?  Or is this the best that can be done right now.

Robert Skinner
skinner@saturn.ucsc.edu