'''
documentclass[
pdftex,
12pt,
a4paper,
chapterprefix,
headinclude,
headsepline,
footsepline,
colordvi,
twoside,
halfparskip,
final,
appendixprefix,
pointlessnumbers,
tablecaptionabove,
BCOR=12mm,
DIV=16,
bibliography=totoc]{scrbook}

usepackage{tikz}
usepackage{enumitem}
usetikzlibrary{shapes.geometric, arrows, calc, fit, positioning, chains, arrows.meta}

%%% styles for Figure: Structure of the paper %%%





begin{document}
tikzset{arrow/.style = {thick,->,>=stealth,}}
tikzset{arrow2/.style = {thick,dotted,->,>=stealth,}}
begin{figure}
centering
begin{tikzpicture}
node[regular polygon, regular polygon sides=8, minimum width=3cm,draw,label=center:Input Scripts] (reg1) at (0,0){};

node[circle,minimum size=3cm, draw, label=center:Export Files] (c1) at (6,0){};

node[regular polygon, regular polygon sides=8, minimum width=3cm,draw,label=center:Input Files] (reg2) at (12,0){};

node[regular polygon, regular polygon sides=4, minimum width=3cm,draw,label=center:Execute] (s1) at (6,-6){};


draw[arrow] (reg1.east) -- (c1.west);
draw[arrow] (c1.east) -- (reg2.west);
draw[arrow] (reg1.east) -- (s1.north);
draw[arrow] (reg2.west) -- (s1.north);
end{tikzpicture}
caption[work-flow prepossess-0]{Prepossessing part-0} label{fig:pre2inout}
end{figure}
end{document}'''