HP C/iX Reference Manual (31506-90011)

26 Chapter3
Data Types and Declarations
Program Structure
Program Structure
A translation unit consists of one or more declarations and function definitions.
Syntax
translation-unit ::=
external-declaration
translation-unit external-declaration
external-declaration ::=
function-definition
declaration
Description
A C program consists of one or more translation units, each of which can be compiled
separately. A translation unit consists of a source file together with any headers and
source files included by the #include preprocessing directive. Each time the compiler is
invoked, it reads a single translation unit and (typically) produces a relocatable object file.
A translation unit must contain at least one declaration or function definition.