The name remind you of Sudoku, right? Sure. Zudoku is a blazingly-fast interactive command-line application to solve Sudoku tables. It uses CSV files for input/output (thanks to rapidcsv), which makes it easy to use.
First, as this project uses Git submodules for its external libraries, do:
git clone https://github.com/machitgarha/zudoku --recurse-modules
Now, everything is ready:
cmake -B build
make -C build
# Run it.
./build/Zudoku
For inputs and outputs, there are predefined CSV file samples living in examples/sudoku-table/ directory.
At code level, implementation is built upon two containers: Stacks and arrays. If you are curious about the details, comprehensive code comments, drastic identifier names and perfect underlying design should help you understanding what is done under the hood.
If you know Persian, you can also switch to report-fa and read the report available there (inside docs/ directory), in PDF (or ODF) format(s).
GPLv3. Did you expect something else? ;)
I'm tired of writing this section. Go somewhere else.