ANSI X3.159-1989, American National Standard for Information Systems – Programming Language – C, contains a section called "Portability Issues." The ANSI section lists areas of the C language that ANSI leaves open to each particular implementation. This section describes how Microsoft C handles these implementation-defined areas of the C language.
This section follows the same order as the ANSI section. Each item covered includes references to the ANSI that explains the implementation-defined behavior.
This section describes the U.S. English-language version of the C compiler only. Implementations of Microsoft C for other languages may differ slightly.