For your journey, I found this Linux mint thread that looks to be helpful. I’ve not touched cups in a while bc the only printers I have access to only allow printing through some crappy proprietary app that doesn’t have a Linux version, so I can’t attest to its correctness.

https://forums.linuxmint.com/viewtopic.php?t=314035

I wonder what the print issue is caused by…

I normally hear that Linux is normally better for printing.

Alas, printers suck

Alternatively:

https://en.cppreference.com/w/cpp/io/manip/endl

p.s. The site isn’t entirely mobile friendly

(I’m a cppref lover tbh)