The source code for the Rust, C++, and Node.js versions of the Memory Game tutorial are located in the respect rust, cpp, and node sub-directories. They are built using mdbook.

Building the tutorial requires mdbook, which you can install with cargo:

cargo install mdbook

To build the tutorial, enter the rust, cpp, or node sub-directory and run:

mdbook build

The output will be in the book/html subdirectory. To check it out, open it in your web browser.

The code in the tutorial is available in separate steps in .rs, .cpp, and .js files.

The .rs files are mapped to different binaries, so you if you change into the rust/src sub-directory, then cargo run will present you with binaries for the different steps.

The .cpp files are built using cpp/src/CMakeLists.txt, which is included from the top-level CMakeLists.txt.