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+%%
+%% The LaTeX Companion, 3ed
+%%
+%% Example A-5-2 on page II-688 in "calc --- Arithmetic calculations".
+%%
+%% Copyright (C) 2022 Frank Mittelbach
+%%
+%% It may be distributed and/or modified under the conditions
+%% of the LaTeX Project Public License, either version 1.3c
+%% of this license or (at your option) any later version.
+%%
+%% See https://www.latex-project.org/lppl.txt for details.
+%%
+
+\documentclass{tlc3exa}
+\pagestyle{empty}
+\setcounter{page}{6}
+\setlength\textwidth{135.0pt}
+%StartShownPreambleCommands
+\usepackage{calc}
+\newcounter{hours}\newcounter{minutes}
+\newcommand\printtime{\setcounter{hours}{\time/60}%
+ \setcounter{minutes}{\time-\value{hours}*60}%
+ \thehours h \theminutes min}
+%StopShownPreambleCommands
+
+\begin{document}
+The time is \printtime.
+\end{document}