The programming language C has been in existence since about 1972. It was developed by Dennis Ritchie and Brian Kernighan for the operating system UNIX.  More then 90% of UNIX was written in C.  With the spread of UNIX, C enjoyed greater popularity as well.  Super C now makes it possible to program in C on the C-64 or C-128.  Here is a link to the Manual.

Note: This is an update/replacement for the previous archive.  This archive is a .G64 disk image instead of a .D64 because the .D64 doesn't load the editor due to some copy protection missing.