\documentclass[]{article}
\usepackage[utf8]{inputenc}
\usepackage[spanish]{babel}
\usepackage{listings}
\usepackage{color}
\usepackage{graphicx}
%%%%Estilos para código%%%%
\definecolor{miverde}{rgb}{0,0.6,0}
\definecolor{mimalva}{rgb}{0.58,0,0.82}
\definecolor{orange}{rgb}{1.0, 0.49, 0.0}
\definecolor{blue}{rgb}{0.0, 0.0, 1.0}
\lstdefinestyle{customc}{
belowcaptionskip=1\baselineskip,
breaklines=true,
frame=L,
xleftmargin=\parindent,
language=C,
showstringspaces=false,
basicstyle=\footnotesize\ttfamily,
keywordstyle=\bfseries\color{miverde},
commentstyle=\itshape\color{mimalva},
identifierstyle=\color{blue},
stringstyle=\color{orange},
}
\lstset{escapechar=@,style=customc}
%opening
\title{Asignatura\\Práctica XX: Título de la práctica}
\author{Autor 1 y Daniel Martín Huestamendia}
\begin{document}
\maketitle
\begin{abstract}
Resumen
\end{abstract}
\section{Sección 1}
\begin{lstlisting}
\end{lstlisting}
\begin{figure}[h]
\centering
\includegraphics[width=\linewidth]{estructura.PNG}
\caption{Ejemplo de imagen}
\label{fig:screenshot001}
\end{figure}
\end{document}
