c2latex provides simple support for literate programming in C. Given a C source file in which the comments have been written in LaTeX, clatex converts the C source file into a LaTeX source file. It can be used to produce typeset listings of C programs and/or documentation associated with the program.

The C source given to c2latex usually has the following form. It starts with a large comment containing LaTeX commands that start a document along with any initial text. Then there is a sequence of comment and code pairs, with the comment explaining the code to follow. The source file is ended by a comment containing LaTeX commands that finish the document. The source of c2latex is distributed in this form. The author is John D Ramsdell.