C and C++: Siblings - Article by Bjarne Stroustrup. We're at a crossroads for compatibility between C and C++. Can siblings go their separate ways and still remain on speaking terms? - http://www.ddj.com/dept/cpp/184401543
C and C++: A Case for Compatibility - Article by Bjarne Stroustrup. Bjarne identifies some non-issues as he continues his case for compatibility between C and C++. - http://www.ddj.com/dept/cpp/184401555
Incompatibilities Between ISO C and ISO C++ - Thorough listing of incompatibilities between ISO C 99 and ISO C++ 98. An incompatible C feature in this context is valid as C code but not as C++ code. - http://david.tribble.com/text/cdiffs.htm