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# Fixed-Font LaTeX Primitive: `\ff` and `\begin{ffcode}`
[](https://github.com/yegor256/ffcode/actions/workflows/l3build.yml)
[](https://ctan.org/pkg/ffcode)
[](https://github.com/yegor256/ffcode/blob/master/LICENSE.txt)
This LaTeX package helps you write source code in your academic papers
and make sure it looks neat. The package uses
[`listings`](https://ctan.org/pkg/listings)
and [`tcolorbox`](https://ctan.org/pkg/tcolorbox) packages.
First,
[install it](https://en.wikibooks.org/wiki/LaTeX/Installing_Extra_Packages)
from [CTAN](https://ctan.org/pkg/ffcode)
and then use in the preamble:
```tex
\documentclass{article}
\usepackage{ffcode}
\begin{document}
The function \ff{r()} reads the file:
\begin{ffcode}
void r() {
// read the file
}
\end{ffcode}
\end{document}
```
Otherwise, you can download
[`ffcode.sty`](https://yegor256.github.io/ffcode/ffcode.sty) and
add to your project.
If you want to contribute yourself, make a fork, then create a branch,
then run `l3build ctan` in the root directory.
It should compile everything without errors. If not, submit an issue and wait.
Otherwise, make your changes and then run `l3build ctan` again. If the build is
still clean, submit a pull request.
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