what is wrong with the code of the figure?

Question

\documentclass[11pt]{article}
\begin{document}
\begin{figure}[H]
\centering
\includegraphics[width=10mm]{penduloPlano.png}
\caption{Rota\c{c}\~{a}o do suporte ocorrendo a manuten\c{c}\~{a}o do plano de oscila\c{c}\~{a}o do p\^{e}ndulo.}
\label{fig:rota\c{c}\~{a}o do p\^{e}ndulo}
\end{figure}
\end{document}

I have the image in the same folder that the tex file.

Answer 1

Three things are wrong:

1. You need \usepackage{float} to use [H].

2. You need \usepackage{graphicx} to use \includegraphics.

3. You can't have (and don't want) the accents in the label, use something like \label{fig:rotacaopendulo} instead.

---

\documentclass[11pt]{article}
\usepackage{float,graphicx}
\begin{document}
\begin{figure}[H]
\centering
\includegraphics[width=10mm]{example-image}
\caption{Rota\c{c}\~{a}o do suporte ocorrendo a manuten\c{c}\~{a}o do plano de oscila\c{c}\~{a}o do p\^{e}ndulo.}
\label{fig:rotacaopendulo}
\end{figure}
\end{document}