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From: papa@uscvax.UUCP (Marco Papa)
Newsgroups: net.micro.amiga
Subject: Mandelbrot's program broken under Lattice C 3.02
Message-ID: <239@uscvax.UUCP>
Date: Sat, 11-Jan-86 13:41:59 EST
Article-I.D.: uscvax.239
Posted: Sat Jan 11 13:41:59 1986
Date-Received: Tue, 14-Jan-86 04:14:03 EST
Organization: CS&CE Depts, U.S.C., Los Angeles, CA
Lines: 35

I guess I just got bitten by the Lattice "C' nasty bug referred by John Draper
as follows:

"...Good ol Lattice C has a nasty bug that won't let me use four cases 
without crashing. This is why it takes so long to write programs on the 
Amiga. ..."

When running the new version of the Mandelbrot program by Robert French, 
modified by RJ Mical of Commodore Amiga, I run into the following problems:

1. the Preset function does not work.  All the 4 values (SR, ER, SI, EI) get
   initialized to the same values (it seems to be the first one).  Which means
   that also at startup the values are wrong.

2. The CM (change mode) command does not work.  I don't seem to be able
   to get interlace at all.

3. Saved images are not loaded back correctly (the limits are wrong).  This 
   makes the program totally useless.

I noted that RJ Mical has used the "case" statement extensively in his 
modified version.  Did he compile and test it with the Greenhills C compiler 
only, or did he try it out also with Lattice C 3.02?  Has anybody else 
experienced similar problems with the new version.

By the way, the old version of the Mandelbrot program does not have any of
above mentioned problems.  

Marco Papa
USC - Computer Science Dept.

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