Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!iuvax!rutgers!cmcl2!adm!xadmx!jc58+@andrew.cmu.edu
From: jc58+@andrew.cmu.edu (Johnny J. Chin)
Newsgroups: comp.lang.pascal
Subject: Re: function return value
Message-ID: <18610@adm.BRL.MIL>
Date: 9 Mar 89 00:03:52 GMT
Sender: news@adm.BRL.MIL
Lines: 26

Your function should read like this:

function what (x:string):string;
var tmp:string;
begin
  tmp:=x;
  what := tmp + tmp;
end;

In your original function, the line which reads:

  what:=what+what;

causes an error because "what" is a function and NOT a variable.

I hope this info helps.
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Disclaimer:   The views expressed herein are STRICTLY my own, and not CMU's.