How to use the same style for the unnumbered chapters as the numbered chapters?

Question

I'm using this style for the numbered chapters in my report but it doesn't use the same style for the unnumbered. How do I fix that?

\makeatletter
\def\thickhrulefill{\leavevmode \color{martec} \leaders \hrule height 1ex \hfill \kern \z@ }
\def\@makechapterhead#1{%
  %\vspace*{50\p@}%
  \vspace*{0\p@}%
  {\parindent \z@ \centering \reset@font
        \thickhrulefill\quad
        \scshape \@chapapp{} \thechapter
        \quad \thickhrulefill\color{martec1}
        \par\nobreak
        \vspace*{10\p@}%
        \interlinepenalty\@M
        \hrule height 0.3ex
        \vspace*{10\p@}%
        \Huge \bfseries #1\par\nobreak
        \par 
        \vspace*{5\p@}%
        \hrule height 0.1ex
    \vskip 30\p@
   % \vskip 100\p@
  }}

Answer 1

There are many packages to help you with the design of chapter styles.

Try for example the package fncychap.

(Unless of course you want to sharpen your TeX programming skills)

Meanwhile try this code.

\documentclass{book}

\usepackage{xcolor}

\makeatletter
\def\thickhrulefill{\leavevmode \color{red} \leaders \hrule height 1ex \hfill \kern \z@ }

\def\@makechapterhead#1{%
    %\vspace*{50\p@}%
    \vspace*{0\p@}%
    {\parindent \z@ \centering \reset@font
        \thickhrulefill\quad
        \scshape \@chapapp{} \thechapter
        \quad \thickhrulefill\color{green}
        \par\nobreak
        \vspace*{10\p@}%
        \interlinepenalty\@M
        \hrule height 0.3ex
        \vspace*{10\p@}%
        \Huge \bfseries #1\par\nobreak
        \par 
        \vspace*{5\p@}%
        \hrule height 0.1ex
        \vskip 30\p@
        % \vskip 100\p@
}}

\def\@makeschapterhead#1{%
        \vspace*{0\p@}%
    {\parindent \z@ \centering \reset@font  
         \thickhrulefill\color{green}
        \par\nobreak
        \vspace*{10\p@}%
        \interlinepenalty\@M
        \hrule height 0.3ex
        \vspace*{10\p@}%
        \Huge \bfseries #1\par\nobreak
        \par 
        \vspace*{5\p@}%
        \hrule height 0.1ex
        \vskip 30\p@
    }}

\makeatother

\begin{document}    
    
\chapter*{No numbered}

\chapter{With number}
    
\end{document}