[Tex/LaTex] Including a text file in LaTeX

inputsourcecodeverbatim

I write a program by DevC++ compiler and save it by .cpp format, and want to paste the code in my editor, Do I have to paste all the code each time?
Is there a way to include the file instead of copying and pasting the code over and over?
I suppose there should be a way because for a program of about 100 lines the including the file is more convenient.

Best Answer

Normally this is done using the listings package. It provides a lstlisting environment for verbatim code and also a \lstinputlisting[<options,...>]{<file name>} to include an external file verbatim. As options you can select language=C++ to get specific syntax highlighting. I also usually use basicstyle=\ttfamily. See the listings package manual for more details.

Related Solutions

[Tex/LaTex] \input only part of a file

Here is an approach in pure TeX (well, e-TeX). The main idea is: to select a range of lines in a file, sed is overkill, TeX is more than enough. As a bonus, no temporary file is needed.

\documentclass[a4paper]{article}
\usepackage[ascii]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{lmodern}

\makeatletter
\newread\pin@file
\newcounter{pinlineno}
\newcommand\pin@accu{}
\newcommand\pin@ext{pintmp}
% inputs #3, selecting only lines #1 to #2 (inclusive)
\newcommand*\partialinput [3] {%
  \IfFileExists{#3}{%
    \openin\pin@file #3
    % skip lines 1 to #1 (exclusive)
    \setcounter{pinlineno}{1}
    \@whilenum\value{pinlineno}<#1 \do{%
      \read\pin@file to\pin@line
      \stepcounter{pinlineno}%
    }
    % prepare reading lines #1 to #2 inclusive
    \addtocounter{pinlineno}{-1}
    \let\pin@accu\empty
    \begingroup
    \endlinechar\newlinechar
    \@whilenum\value{pinlineno}<#2 \do{%
      % use safe catcodes provided by e-TeX's \readline
      \readline\pin@file to\pin@line
      \edef\pin@accu{\pin@accu\pin@line}%
      \stepcounter{pinlineno}%
    }
    \closein\pin@file
    \expandafter\endgroup
    \scantokens\expandafter{\pin@accu}%
  }{%
    \errmessage{File `#3' doesn't exist!}%
  }%
}
\makeatother

% for testing purpose
\begin{filecontents}{pitest}
5 You shouldn't see this.\par
6 Let the fun begin!
7 \iffalse
8 bla
9 \fi

11 New paragraph.
12 \verb*+\foo (two  spaces)~_$^+ bla
13 You shouldn't see this.\par
\end{filecontents}

\begin{document}

\partialinput{6}{12}{pitest} random text

\end{document}

I think/hope this approach is robust, mostly thanks to e-TeX's \readline. See the included test file for potential edge cases that do work.

[Tex/LaTex] Replace \input{fileX} by the content of fileX automatically

You can use the following tools to do this. All of them are on CTAN but not all of them are part of either TeXLive or MikTeX, so you may need to manually install them. They need either Perl or a C compiler installed. Both should not be a problem with Linux but might be one under Windows or Mac. However IIRC TeXLive installs its own Perl interpreter.

latexpand Perl script:

Latexpand is a Perl script that simply replaces \input and \include commands with the content of the file input/included. The script does not deal with \includeonly commands.

Installation:

Simply download it from http://mirrors.ctan.org/support/latexpand/latexpand and run it. You need Perl installed however.

Usage:

    perl latexpand mainfile.tex > newfile.tex

flatex

A C program to flatten a LaTeX file into a single file, by explicitly including the files included by \include and \input commands. Also, if BibTeX is being used, then includes the bbl file into the resulting file. The result is therefore a stand-alone LaTeX file that can be emailed to a collaborator.

Installation:

Get the single C file and compile it, e.g. with cc flatex.c -o flatex.

Usage:

    flatex mainfile.tex > newfile.tex

flatten

A program to flatten a LaTeX root file by copying \input and \include files into the root file.

Installation:

Get the ZIP file from CTAN, unpack it and run make followed by make install. You need a C compiler and maybe flex for this. However it seems quite old and you might run in trouble because of it. I failed compiling it!

Usage:

    flatten mainfile.tex newfile.tex

Best Answer

Related Solutions

[Tex/LaTex] \input only part of a file

[Tex/LaTex] Replace \input{fileX} by the content of fileX automatically

Installation:

Usage:

Installation:

Usage:

Installation:

Usage:

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