example-3.17.tex

\documentclass{article}

%% Denote paragraphs with vertical space rather than indenting (not critical)
\usepackage{parskip}

%% Support for URL in introductory text (not needed for main example)
\usepackage{url}

%% *** Enable TikZ ***
\usepackage{tikz}

%% *** TikZ library ***
\usetikzlibrary{arrows.meta}

\begin{document}

%% Introductory Text
Example 3.17 from the book\\
\emph{Unlocking LaTeX Graphics: A Concise Guide to Ti$k$Z/PGF and PGFPLOTS}.\\
For more information, visit \url{https://latex-graphics.com}.
\par\bigskip

%% *** START OF EXAMPLE CODE ***
\begin{tikzpicture}[>=Triangle,
    circ/.style={circle, draw},
    connect/.style={auto, sloped, inner sep=0.1em}]
  \node[circ] at (0,0) (A) {A};
  \node[circ] at (-1,-1.5) (B) {B}
    edge[->] node[connect]{flow} (A) ;
  \node[circ] at (0,-3) (C) {C}
    edge[->] node[connect]{flow} (B);
  \path (A) edge[->,bend left] node[connect]{flow} (C);
\end{tikzpicture}
%% *** END OF EXAMPLE CODE ***

\end{document}