Compatible and composite types

With Kernighan and Ritchie C, and even more so with ANSI C, it is possible for two declarations that refer to the same entity to be other than identical. The term ``compatible type'' is used in ANSI C to denote those types that are ``close enough.'' This section describes compatible types as well as ``composite types'' -- the result of combining two compatible types.

This section is organized as follows:

• ``Multiple declarations''

• ``Separate compilation compatibility''

• ``Single compilation compatibility''

• ``Compatible pointer types''

• ``Compatible array types''

• ``Compatible function types''

• ``Special cases''

• ``Composite type''