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C Style: Standards and Guidelines (contents)

CHAPTER 8 : Language Usage

PART 4 : USAGE

CHAPTER 8 : Language Usage
8.1 General principles of language usage
8.2 Using expressions
8.3 Using 'if'
8.4 Using 'while'
8.5 Using 'for'
8.6 Using 'do'
8.7 Using 'switch'
8.8 Using 'goto'
8.9 Using 'continue' and 'break'
8.10 Using 'return'
8.11 Using functions
8.12 Using '#define'
8.13 Conditional compilation
8.14 Other preprocessor commands
8.15 Summary

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8.14  Other preprocessor commands

#include, #define and #if constructs are by far the most commonly used preprocessor commands, and hence need more said about their use. Other commands, however, should not be forgotten.

 

#error can be useful in conditional compilation situations which should not happen:

 

#if !defined( SYS_NAME )
#    error "SYS_NAME not defined"

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#pragma is potentially dangerous in portability situations, as it causes implementation dependent actions.

 

A general danger with lesser-used features of the language is in the potential for misunderstanding and confusion by the non-expert reader.

 

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