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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /info/examples/luaintro/06-07-2.lualtx
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+%%
+%% Ein Beispiel der DANTE-Edition
+%%
+%% 1. Auflage
+%%
+%%
+%% Copyright (C) 2014 Herbert Voss
+%%
+%% It may be distributed and/or modified under the conditions
+%% of the LaTeX Project Public License, either version 1.3
+%% of this license or (at your option) any later version.
+%%
+%% See http://www.latex-project.org/lppl.txt for details.
+%%
+%%
+%% ====
+% Show page(s) 1
+%%
+%%
+\documentclass[]{exaarticle}
+\pagestyle{empty}
+\setlength\textwidth{141.1235pt}
+\setlength\parindent{0pt}
+\usepackage{fontspec}
+%StartShownPreambleCommands
+\usepackage{luacode}
+%StopShownPreambleCommands
+\begin{document}
+\begin{luacode*}
+function AlternierendeSumme(Max) -- Maximalzahl
+ local Start = os.clock() -- Startzeit holen
+ local Summe = 1 -- Startwert
+ local k0 = 1 -- Zähler
+ for k=2, Max do -- For-Schleife
+ k0 = k0 + k -- Zählersumme
+ if k % 2 == 0 then Summe = Summe - k0/(k*k)
+ else Summe = Summe + k0/(k*k)
+ end
+ end
+ local Stop = os.clock() -- Endzeit holen
+ tex.sprint(Summe .. " (" .. Stop-Start .. " sek)" )
+end
+\end{luacode*}
+Die Summe ist für $k=1000001$ gleich
+\directlua{AlternierendeSumme(1000001)}.
+In der Klammer steht die für die Berechnung
+benötigte Zeit.
+\end{document}