Path: utzoo!utgpu!news-server.csri.toronto.edu!rpi!zaphod.mps.ohio-state.edu!sdd.hp.com!spool.mu.edu!munnari.oz.au!metro!grivel!gara!ijohnson
From: ijohnson@gara.une.oz.au (Ian Johnson)
Newsgroups: comp.lang.pascal
Subject: Pointers in TP
Keywords: Pointers, TP
Message-ID: <5841@gara.une.oz.au>
Date: 5 Apr 91 01:39:46 GMT
Article-I.D.: gara.5841
Organization: University of New England, Armidale, Australia
Lines: 17


 
 This question is, hopefully, very simple.  Referring to the 'hugemats' 
 program by Kent Porter (as cited by Timo Salmi in his frequently asked
 questions and answers information) if I define a var as 
   SingleCol : colArray;
 and then in the program have the statement
   SingleCol := A^[25].col^;
 this appears to isolate the 25th row (col) of the matrix A.  My question
 is, is this safe?  I'm not really experienced with pointers, and am 
 worried that it may appear to work, but that the memory associated with
 SingleCol may be over written.
 
 Thanks in advance.
 
 
 Ian Johnson:  email  ijohnson@gara.une.oz.au