\newcommand{\cmd}[1]{\texttt{#1}} % shell command
\newcommand{\code}[1]{\texttt{#1}} % for simple code
+\newcommand{\myfunc}[1]{\texttt{#1}} % for my functions
+
\newcommand{\func}[1]{%
\index{funzione!{#1}@{{\tt {#1}}}}\texttt{#1}%
%\index{#1@{{\tt {#1}} (funzione)}}\texttt{#1}%