CC78K4 Datasheet, PDF(138/523 Page) NEC – CC78K4 Ver.2.30 or Later, C Compiler Language

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CC78K4 Datasheet, PDF (138/523 Pages) NEC – CC78K4 Ver.2.30 or Later, C Compiler Language

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CHAPTER 9 PREPROCESSING DIRECTIVES (COMPILER DIRECTIVES)

(1) #if directive

Conditional Translation Directives

#if

FUNCTION

The #if directive tells the translation phase of C to skip (discard) a section of source code if the value of the

constant expression is 0.

SYNTAX

#if constant expression line feed ï£®groupï£»

EXAMPLE

#if FLAG == 0

:

#endif

EXPLANATION

In the above example, the constant expression âFLAG == 0â is evaluated to determine whether a set of

statements (i.e., source code) between #if and #endif is to be used in the translation phase. If the value of

âFLAGâ is nonzero, the source code between #if and #endif will be discarded. If the value is zero, the source

code between #if and #endif will be translated.

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Userâs Manual U15556EJ1V0UM

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