this program outputs SI prefixes
git clone https://github.com/itonyluke/si_prefixes si_prefixes
gcc -Wall -Wextra -Werror si_prefixes.c
./a.out
![output example](https://raw.githubusercontent.com/itonyluke/si_prefixes/main/images/example.png)
built and tested on Darwin Kernel Version 18.7.0: Tue Jun 22 19:37:08 PDT 2021; root:xnu-4903.278.70~1/RELEASE_X86_64 x86_64