Make a C programming language array in LaTeX

Consider using something plainer, like this:

\documentclass{article}
\usepackage{expl3,xparse}
\ExplSyntaxOn
\keys_define:nn { brian / c-array } {
  name         .tl_set:N = \l_brian_c_array_name_tl,
  name-fmt     .tl_set:N = \l_brian_c_array_name_fmt_tl,
  index-start .int_set:N = \l_brian_c_array_index_int,
  addr-start  .int_set:N = \l_brian_c_array_addr_int,
  addr-step   .int_set:N = \l_brian_c_array_addr_step_int,
  addr-fmt     .tl_set:N = \l_brian_c_array_addr_fmt_tl,
  inner-fmt    .tl_set:N = \l_brian_c_array_inner_fmt_tl,
  top-skip    .dim_set:N = \l_brian_c_array_top_skip_dim,
  bottom-skip .dim_set:N = \l_brian_c_array_bottom_skip_dim,
  inner-strut  .tl_set:N = \l_brian_c_array_inner_strut_tl,
}

\cs_new:Nn \__brian_temp:n{
  & \multicolumn{1}{c|}{
    \l_brian_c_array_inner_fmt_tl
    #1
  }
}

\NewDocumentCommand \CArray { O{} m O{\rule[-2.25ex]{0pt}{6ex}}} {
  \group_begin:
  \keys_set:nn
    { brian / c-array }
    { name=arr,
      name-fmt=\ttfamily\small,
      index-start=0,
      addr-start=2000,
      addr-step=4,
      top-skip = \medskipamount,
      bottom-skip = 3ex,
      inner-strut = \rule[-2.25ex]{0pt}{6ex},
      inner-fmt = \rmfamily,
      addr-fmt = \rmfamily,
      #1 }

  \seq_set_split:Nnn \l_tmpa_seq { , } { #2 }
  \seq_pop_left:NN   \l_tmpa_seq \l_tmpa_tl
  \int_set:Nn \l_tmpa_int { \seq_count:N \l_tmpa_seq }


  \begin{tabular}{*{\int_eval:n { \seq_count:N \l_tmpa_seq + 1 }}{c}}
    \tl_use:N \l_brian_c_array_name_fmt_tl
    \tl_use:N \l_brian_c_array_name_tl
    [\int_use:N \l_brian_c_array_index_int]
    \prg_replicate:nn {\int_use:N \l_tmpa_int}
      { 
        &
        \int_gincr:N \l_brian_c_array_index_int
        \tl_use:N \l_brian_c_array_name_fmt_tl
        \tl_use:N \l_brian_c_array_name_tl
        [\int_use:N \l_brian_c_array_index_int]
      }
      \\[\l_brian_c_array_top_skip_dim]
      \hline

      \multicolumn{1}{|c|}{
        \l_brian_c_array_inner_strut_tl
        \l_brian_c_array_inner_fmt_tl
        \tl_use:N \l_tmpa_tl
      }
      \seq_map_function:NN \l_tmpa_seq \__brian_temp:n
      \\
      \hline
      \rule{0pt}{\l_brian_c_array_bottom_skip_dim}
      \l_brian_c_array_addr_fmt_tl
      \int_use:N \l_brian_c_array_addr_int
      \prg_replicate:nn { \int_use:N \l_tmpa_int }
        {
          & \int_gadd:Nn \l_brian_c_array_addr_int
              {
                \int_use:N \l_brian_c_array_addr_step_int
              }
            \l_brian_c_array_addr_fmt_tl
            \int_use:N \l_brian_c_array_addr_int
        }
  \end{tabular}

  \group_end:
}
\ExplSyntaxOff

\begin{document}
\centering

\CArray[
addr-start=65508,
addr-step=4,
name=tab,
name-fmt=\ttfamily\small,
inner-fmt=\ttfamily,
]{1234, 56, 1212, 33, 1434, 80, 1312, 78}

\vspace{1in}

\CArray[inner-fmt=\ttfamily\large,name-fmt=\ttfamily]
{1,2,3}
\end{document}

If you really want the tabular shadow, I can edit that in. (I need to figure out how to do it, first :))

_{A big thanks to @hugovdberg and @egreg for sorting out the intermediate snafoo with \seq_map_…:. :)}

This is far from okey. But it works. I hope someone comes with a more automatized version (I would even prefer TikZ for this over my solution). EDIT I was silly enough to make first and last line with \multicolumn while it's easier to use it just in the middle row. I keep this unchanged, since I'm not fond (:P) of this solution.

\documentclass{scrartcl}

\begin{document}
\begin{tabular}{|c|c|c|}
    \multicolumn{1}{c}{a} & \multicolumn{1}{c}{b} & \multicolumn{1}{c}{c} \\ \hline
    c & d & e \\ \hline
    \multicolumn{1}{c}{e} & \multicolumn{1}{c}{f} & \multicolumn{1}{c}{g}
\end{tabular}
\end{document}

---

And here goes something to play with tap, which can break some things as it mixes Plain Tex with Latex, but… I like the output (I also used it here).

\documentclass{scrartcl}
\input{tap}

\begin{document}
\begintable
    \begintableformat
        & \center
    \endtableformat
    \B": \texttt{tab[0]} " \texttt{tab[1]} " \texttt{tab[2]} " \texttt{tab[3]} " \texttt{tab[4]} " \texttt{tab[5]} " \texttt{tab[6]} " \texttt{tab[7]} \E"
    \=
    \B!: 1234 ! 56 ! 1212 ! 33 ! 1434 ! 80 ! 1312 ! 78 \E!
    \=
    \B": 65508 " 65510 " 65512 " 65514 " 65516 " 65518 " 65520 " 65522 \E"
\endtable
\end{document}