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1. The Free On-line Dictionary of Computing (30 December 2018) |
C preprocessor
(cpp) The standard Unix
macro-expansion utility run as the first phase of the C
compiler, cc. Cpp interprets lines beginning with "#" such
as
#define BUFFER_SIZE 256
as a textual assignment giving the symbol BUFFER_SIZE a
value "256". Symbols defined with cpp are traditionally given
upper case names to distinguish them from C identifiers. This
symbol can be used later in the input, as in
char input_buffer[BUFFER_SIZE];
This use of cpp to name constants, rather than writing these
magic numbers inline, makes a program easier to read and
maintain, especially if there is more than one occurrence of
BUFFER_SIZE all of which must all have the same value.
Cpp macros can have parameters:
#define BIT(n) (1<<(n))
This can be used with any appropriate actual argument:
msb = BIT(nbits-1);
Note the parentheses around the "n" in the definition of BIT.
Without these, operator precedence might mean that the
expression substituted in place of n might not be interpreted
correctly (though the example above would be OK).
Cpp also supports conditional compilation with the use of
#ifdef SYMBOL
...
#else
...
#endif
and
#if EXPR
...
#else
...
#endif
constructs, where SYMBOL is a Cpp symbol which may or may not
be defined and EXPR is an arithmetic expression involving only
Cpp symbols, constants and C operators which Cpp can evaluate
to a constant at compile time.
Decus cpp is a free implementation for VMS.
The most widely used C preprocessor today is the GNU CPP,
distributed as part of GCC.
(2001-12-31)
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Common Misspellings > |
C preprocessor C preprocessor Cpreprocessor C Cpreprocessor preprocessor CC preprocessor Cp reprocessor C p reprocessor Cpreprocessor C preprocessor C rpeprocessor C prpeprocessor C reprocessor C ppreprocessor C perprocessor C prerprocessor C peprocessor C prreprocessor C prperocessor C preperocessor C prprocessor C preeprocessor C prerpocessor C preprpocessor C prerocessor C prepprocessor C preporcessor C preprorcessor C prepocessor C preprrocessor C preprcoessor C preprocoessor C preprcessor C preproocessor C preproecssor C preprocecssor C preproessor C preproccessor C preprocsesor C preprocesesor C preprocssor C preproceessor C preprocesssor C preprocesor C preprocesssor C preprocesosr C preprocessosr C preprocesor C preprocesssor C preprocessro C preprocessoro C preprocessr C preprocessoor C preprocessror C preprocesso C preprocessorr s preprocessor cs preprocessor sc preprocessor d preprocessor cd preprocessor dc preprocessor f preprocessor cf preprocessor fc preprocessor x preprocessor cx preprocessor xc preprocessor v preprocessor cv preprocessor vc preprocessor preprocessor c preprocessor c preprocessor C 0reprocessor C p0reprocessor C 0preprocessor C )reprocessor C p)reprocessor C )preprocessor C oreprocessor C poreprocessor C opreprocessor C lreprocessor C plreprocessor C lpreprocessor C p4eprocessor C pr4eprocessor C p4reprocessor C p$eprocessor C pr$eprocessor C p$reprocessor C p5eprocessor C pr5eprocessor C p5reprocessor C peeprocessor C preeprocessor C pereprocessor C pteprocessor C prteprocessor C ptreprocessor C pdeprocessor C prdeprocessor C pdreprocessor C pfeprocessor C prfeprocessor C pfreprocessor C pgeprocessor C prgeprocessor C pgreprocessor C pr3processor C pre3processor C pr3eprocessor C pr#processor C pre#processor C pr#eprocessor C pr4processor C pre4processor C pr4eprocessor C prwprocessor C prewprocessor C prweprocessor C prrprocessor C prerprocessor C prreprocessor C prsprocessor C presprocessor C prseprocessor C prdprocessor C predprocessor C prdeprocessor C prfprocessor C prefprocessor C prfeprocessor C praprocessor C priprocessor C proprocessor C pruprocessor C pre0rocessor C prep0rocessor C pre0processor C pre)rocessor C prep)rocessor C pre)processor C preorocessor C preporocessor C preoprocessor C prelrocessor C preplrocessor C prelprocessor C prep4ocessor C prepr4ocessor C prep4rocessor C prep$ocessor C prepr$ocessor C prep$rocessor C prep5ocessor C prepr5ocessor C prep5rocessor C prepeocessor C prepreocessor C preperocessor C preptocessor C preprtocessor C preptrocessor C prepdocessor C preprdocessor C prepdrocessor C prepfocessor C preprfocessor C prepfrocessor C prepgocessor C preprgocessor C prepgrocessor C prepr9cessor C prepro9cessor C prepr9ocessor C prepr(cessor C prepro(cessor C prepr(ocessor C prepr0cessor C prepro0cessor C prepr0ocessor C prepricessor C preproicessor C prepriocessor C preprpcessor C prepropcessor C preprpocessor C preprkcessor C preprokcessor C preprkocessor C preprlcessor C preprolcessor C preprlocessor C prepracessor C preprecessor C preprucessor C preprosessor C preprocsessor C preproscessor C preprodessor C preprocdessor C preprodcessor C preprofessor C preprocfessor C preprofcessor C preproxessor C preprocxessor C preproxcessor C preprovessor C preprocvessor C preprovcessor C prepro essor C preproc essor C prepro cessor C preproc3ssor C preproce3ssor C preproc3essor C preproc#ssor C preproce#ssor C preproc#essor C preproc4ssor C preproce4ssor C preproc4essor C preprocwssor C preprocewssor C preprocwessor C preprocrssor C preprocerssor C preprocressor C preprocsssor C preprocesssor C preprocsessor C preprocdssor C preprocedssor C preprocdessor C preprocfssor C preprocefssor C preprocfessor C preprocassor C preprocissor C preprocossor C preprocussor C preproceqqor C preprocesqqor C preproceqqsor C preprocewwor C preproceswwor C preprocewwsor C preproceeeor C preproceseeor C preproceeesor C preproceaaor C preprocesaaor C preproceaasor C preproceddor C preprocesddor C preproceddsor C preprocezzor C preproceszzor C preprocezzsor C preprocexxor C preprocesxxor C preprocexxsor C preproceccor C preprocesccor C preproceccsor C preproce or C preproces or C preproce sor C preprocess9r C preprocesso9r C preprocess9or C preprocess(r C preprocesso(r C preprocess(or C preprocess0r C preprocesso0r C preprocess0or C preprocessir C preprocessoir C preprocessior C preprocesspr C preprocessopr C preprocesspor C preprocesskr C preprocessokr C preprocesskor C preprocesslr C preprocessolr C preprocesslor C preprocessar C preprocesser C preprocessur C preprocesso4 C preprocessor4 C preprocesso4r C preprocesso$ C preprocessor$ C preprocesso$r C preprocesso5 C preprocessor5 C preprocesso5r C preprocessoe C preprocessore C preprocessoer C preprocessot C preprocessort C preprocessotr C preprocessod C preprocessord C preprocessodr C preprocessof C preprocessorf C preprocessofr C preprocessog C preprocessorg C preprocessogr Definition commonly spelled as: Defanition or Defenition, Synonym as: Synonim, Sinonym or Sinonim, Thesaurus as: Thesorus or Thesauris, Dictionary as: Dictionery or Dictionry and Define is usually not misspelled. 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