[Tex/LaTex] Listings numbering doesn’t restart

Question

I have problem with listing numbering from this topic. Numbering isn't restarted, it just continues.

\AtBeginDocument{%
  \renewcommand{\thelstlisting}{%
    \ifnum\value{subsection}=0
      \thesection.\arabic{lstlisting}%
    \else
      \ifnum\value{subsubsection}=0
        \thesubsection.\arabic{lstlisting}%
      \else
        \thesubsubsection.\arabic{lstlisting}%
      \fi
    \fi
  }
}

For subsubsection 4.2.1 it should start from the beginning but it continues so I'm getting 4.2.1.2 (because there is one previous listing).

Answer 1

It's no different from what I already suggested you as answer to Caption and sections, subsections and subsubsections

The only addition is that \AtBeginDocument is necessary, because listings defines there the counter.

\documentclass{article}
\usepackage{listings,chngcntr}

\AtBeginDocument{%
  \counterwithin*{lstlisting}{section}
  \counterwithin*{lstlisting}{subsection}
  \counterwithin*{lstlisting}{subsubsection}
  \renewcommand{\thelstlisting}{%
    \ifnum\value{subsection}=0
      \thesection.\arabic{lstlisting}%
    \else
      \ifnum\value{subsubsection}=0
        \thesubsection.\arabic{lstlisting}%
      \else
        \thesubsubsection.\arabic{lstlisting}%
      \fi
    \fi
  }%
}

\begin{document}
\section{A section}
\begin{lstlisting}[caption=Caption]
\caption{section.lstlisting}
\end{lstlisting}
\subsection{A subsection}
\begin{lstlisting}[caption=Caption]
\caption{subsection.lstlisting}
\end{lstlisting}
\begin{lstlisting}[caption=Caption]
\caption{subsection.lstlisting}
\end{lstlisting}
\subsubsection{A subsubsection}
\begin{lstlisting}[caption=Caption]
\caption{subsubsection.lstlisting}
\end{lstlisting}
\subsection{A subsection}
\begin{lstlisting}[caption=Caption]
\caption{subsection.lstlisting}
\end{lstlisting}
\section{A section}
\begin{lstlisting}[caption=Caption]
\caption{section.lstlisting}
\end{lstlisting}

\end{document}