Date: 13 Jan 1994 16:42:27 -0500 (EST)
From: Michael Downes <MJD@MATH.AMS.ORG>
Subject: Around the Bend #16
To: info-tex@shsu.edu
X-ListName: TeX-Related Network Discussion List <INFO-TeX@SHSU.edu>

************************************************************************
*** Exercise 16:
Predict the messages that will be produced by plain TeX for the
following test file.

\catcode`\@=11 \newcount\m
\def\msg#1{\advance\m 1 \message{(\number\m): #1}}
\def\T{\msg{T}}\def\F{\msg{F}}
\mag=1728 \hfuzz=1pt \tabskip=1pt \baselineskip=12pt
\topskip=10pt \lineskiplimit=1pt \lineskip=1pt

\setbox0\vbox{%
\mag=\time \ifnum\mag>1500 \T\else\F\fi                         %  (1) 
\mag=\number\year \ifnum\mag>1500 \T\else\F\fi                  %  (2) 
\hfuzz=99pt \ifdim\hfuzz=99pt \T\else \F\fi                     %  (3) 
\tabskip=\z@ \ifdim\tabskip<\p@\T\else\F\fi                     %  (4) 
\tabskip=\p@ minus2pt \ifdim\tabskip>\z@\T\else\F\fi            %  (5) 
\baselineskip=-\prevdepth \ifdim\baselineskip=12pt \T\else\F\fi %  (6) 
\advance\baselineskip 2\topskip                                 %  (7) 
  \ifdim\baselineskip>\@m\p@ \T\else\F\fi                       %        
\lineskiplimit=\z@ \ifnum\lineskiplimit>0 \T\else\F\fi          %  (8) 
\lineskip=\z@skip \ifdim\lineskip>\lineskiplimit \T\else\F\fi   %  (9) 
\kern2pc\ifdim\lastkern=2pc \T \else\F\fi                       % (10)
\hskip1em
  \ifvmode\T\else\ifdim\lastskip>\z@\msg{FT}\else\msg{FF}\fi\fi % (11) 
\font\cmrtest=cmr10 \ifx\cmrtest\tenrm \T\else\F\fi             % (12)
}
\end

Where should \relax be inserted?
************************************************************************

Answers will be posted circa January 27, 1994.

Michael Downes %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
mjd@math.ams.org (Internet) ASCII 32--54,55--126: !"#$%&'()*+,-./0123456
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