what is a koan?

A kōan 公案 (pinyin: gōng'àn) is a story, question, or statement, which is used in Zen practice to provoke the “great doubt” and test a student's progress in Zen practice.

Inspired by ruby koans you may learn the syntax and practices of C through a series of lessons in the form of Unit tests. These prepared tests are all failing, by going through each one and repairing them to make them pass you will learn a small component of the C programming language.

The test are written in the Criterion unit testing library.