Preprocessor - cppreference.com
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Il preprocessore viene eseguito prima che la compilazione inizi. Il risultato del pre-processing è un singolo file che viene quindi passato al compilatore effettivo.
Original:
The preprocessor runs before the compilation begins. The result of preprocessing is single file which is then passed to the actual compiler.
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Direttive
Le direttive al preprocessore controllano il comportamento del preprocessore. Ogni direttiva occupa una riga e ha il seguente formato:
Original:
The preprocessing directives control the behavior of the preprocessor. Each directive occupies one line and has the following format:
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#carattereOriginal:
#characterThe text has been machine-translated via Google Translate.
You can help to correct and verify the translation. Click here for instructions.istruzione pre-elaborazione (uno dei
define,undef,include,if,ifdef,ifndef,else,elif,endif,line,error,warning,pragma)Original:
preprocessing instruction (one of
define,undef,include,if,ifdef,ifndef,else,elif,endif,line,error,warning,pragma)The text has been machine-translated via Google Translate.
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Original:
arguments (depends on the instruction)
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Original:
line break
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La direttiva null (# seguita da un'interruzione di riga) è ammesso e non ha alcun effetto.
Original:
The null directive (# followed by a line break) is allowed and has no effect.
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Capabilities
Il preprocessore ha le capacità di traduzione dei file di origine:
Original:
The preprocessor has the source file translation capabilities:
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' replace' macro di testo anche se può concatenare o citando identificatori (controllata dalle direttive
#definee#undef, e gli operatori e###)Original:
replace text macros while possibly concatenating or quoting identifiers (controlled by directives
#defineand#undef, and operators#and##)The text has been machine-translated via Google Translate.
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#includedirettiva)Original:
include other files (controlled by directive
#include)The text has been machine-translated via Google Translate.
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#warning)Original:
cause a warning (controlled by directive
#warning)The text has been machine-translated via Google Translate.
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#error)Original:
cause an error (controlled by directive
#error)The text has been machine-translated via Google Translate.
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I seguenti aspetti del preprocessore può essere controllato:
Original:
The following aspects of the preprocessor can be controlled:
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