We had a project work to submit C programs. Originally, the teacher told us to write the programs by hand. I had written ~20 C programs in my computer and was feeling lazy to write out all of them by hand onto paper. I then asked the teacher if I could submit the programs printed on paper and she said yes.

I was already using Pygments to highlight my source code and was thinking if I could print them highlighted with it.

Pygments has many formatters to format output. I used .rtf but you can also output images as well.

No, now looked at the docs and saw that linenos does not work with rtf formatter. Sorry :(

(I didn't have to print line numbers back then)

You can generate LaTeX documents, images etc. with line numbers. And then print them. hmm.

https://pygments.org/docs/formatters/

https://pygments.org/docs/cmdline/