The free version of this new edition is now available at This new edition has been the occasion to overhaul the presentation in many places, but its main purpose is the update to the new C standard, C23. The goal was to publish this new edition of Modern C at the same time as the new C standard goes through the procedure of ISO publication. The closest approximation of the contents of the new standard in a publically available document can be found here. New releases of major compilers already...