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The GNU C Programming Tutorial - Code index
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# output conversion specifier modifier#define preprocessor directive#else preprocessor directive#error preprocessor directive#if preprocessor directive#ifdef preprocessor directive#ifndef preprocessor directive#include preprocessor directive#line preprocessor directive#undef preprocessor directive% input conversion specifier% integer remainder operator% mod operator% modulo operator% output conversion specifier& bitwise operator& bitwise operator truth table& pointer operator&= bitwise operator' input conversion specifier modifier' output conversion specifier modifier* input conversion specifier modifier* multiplication operator* operator* pointer operator*= operator+ addition operator+ operator+ output conversion specifier modifier+ unary plus operator++ increment operator++ operator++ postfix operator++ prefix operator+= operator, operator- operator- output conversion specifier modifier- subtraction operator- unary minus operator-- decrement operator-- operator-- postfix operator-- prefix operator--static option of GCC-= operator-> dot operator of structures-> member operator-c option of GCC-fPIC option of GCC-fpic option of GCC-I option of GCC-l option of GCC-L option of GCC. dot operator of structures.a file suffix.c file suffix.h file suffix.o file suffix.so file suffix/ div operator/ division operator/ integer division operator/usr/include directory/usr/include/linux directory0 output conversion specifier modifier0 return code< less-than operator<< bitwise operator<<= bitwise operator= (equals sign): Errors
= assignment operator= confused with ==: Confusion of = and ==, Comparisons and logic, Important note about assignment
= operator== confused with =: Confusion of = and ==
== confused with =: Comparisons and logic, Important note about assignment
> greater-than operator>> bitwise operator>>= bitwise operator? operator[ input conversion specifier^ bitwise operator^ bitwise operator truth table^= bitwise operatora input conversion specifier modifiera.out: The compiler
abs functionacos functionar programARG fieldARG parser function argumentarg_num fieldargc variableargp functionARGP structureARGP_ERR_UNKNOWN return codeARGP_KEY_ARG keyARGP_KEY_END keyargp_option structureargp_option structure fieldsargp_parse functionargp_usage functionARGS_DOC fieldarguments structureargv arrayargv variableasin functionasprintf functionatan functionatan2 functionatof functionatoi functionatol functionauto storage class specifierbdflush daemonbreak commandc input conversion specifierc output conversion specifiercast operatorceil functionchar typeclean makefile targetclearerr functionclose functionconst typecos functioncosh functioncreat functionctype.h header filed input conversion specifierd output conversion specifierdo ... while commandDOC fielddouble typeE input conversion specifierE output conversion specifiere output conversion specifierEACCES file name errorEBADF file name errorEBUSY file name errorEEXIST file name errorEFBIG file name errorEINTR file name errorEINVAL error codeEINVAL file name errorEIO file name errorEISDIR file name errorELOOP file name errorelse commandEMFILE file name errorEMLINK file name errorENAMETOOLONG file name errorENOENT file name errorENOMEM error codeENOSPC file name errorENOTDIR file name errorENOTEMPTY file name errorenum typeenvp arrayEOF characterEPERM file name errorEROFS file name errorerrno system variableerror_t functionESPIPE file name errorEXDEV file name errorexit commandexp functionextern storage class specifierf input conversion specifierf output conversion specifierfabs functionFALSE macrofclose commandfclose functionFE_ALL_EXCEPT functionFE_DIVBYZERO floating-point exceptionFE_INEXACT floating-point exceptionFE_INVALID floating-point exceptionFE_OVERFLOW floating-point exceptionFE_UNDERFLOW floating-point exceptionfeof functionferror functionfetestexcept functionfflush functionfgetc functionfgets functionFLAGS fieldfloat typefloor functionfopen commandfor commandfprintf functionfputc functionfputs functionfread functionfree functionfscanf functionfseek functionfsync functionftell functionfwrite functionG input conversion specifierg input conversion specifiergcc: Compiling multiple files, argc and argv, The compiler
getc functiongetchar functiongetdelim functiongetenv functiongetline functiongetopt functiongets functionglibc librarygoto commandgrep commandh input conversion specifier modifieri input conversion specifieri output conversion specifierif commandINFINITY macroinput fieldint typeisalnum functionisalpha functionisascii functioniscntrl functionisdigit functionisgraph functionislower functionisprint functionispunct functionisspace functionisupper functionisxdigit functionKEY fieldKEY parser function argumentL input conversion specifier modifierl input conversion specifier modifierL output conversion specifier modifierl output conversion specifier modifierLD_LIBRARY_PATH shell variablelimits.h header filell input conversion specifier modifierll output conversion specifier modifierlog functionlog10 functionlong double typelong float typelong long typelong typelseek functionm output conversion specifiermake programmalloc functionmath.h header filemath.h system header fileNAME fieldNAN macroNULL pointerO_APPEND file status flagO_CREAT file status flagO_EXCL file status flagO_EXEC file status flagO_RDONLY file status flagO_RDWR file status flagO_TRUNC file status flagO_WRITE file status flagO_WRONLY file status flagOBJ makefile variableobj makefile variableobjects: Variables simplify makefiles
OBJECTS makefile variableOBJS makefile variableobjs makefile variableoff_t typeopen commandopen functionOPTION_ALIAS option flagOPTION_ARG_OPTIONAL option flagOPTION_HIDDEN option flagOPTIONS fieldPARSER fieldpclose functionpopen functionpow functionprintf: Function examples
printf functionps commandputc functionputchar functionputs functionq input conversion specifier modifierq output conversion specifier modifierread functionrealloc functionregister storage class specifierrename functionreturn commandrewind functionrewind macrorm programrmdir functions input conversion specifiers output conversion specifierscanf functionSEEK_CUR constantSEEK_END constantSEEK_SET constantshort typesin functionsinh functionsize_t typesizeof functionSPACE output conversion specifier modifiersprintf functionsqrt functionsscanf functionSTATE parser function argumentstatic storage class specifierstdarg.h system header filestdin devicestdio.h header filestdlib.h header filestdout devicestrcat functionstrcmp functionstrcpy functionstring.h header filestrlen functionstrncat functionstrncmp functionstrncpy functionstrstr functionstruct typeswitch commandtan functiontanh functiontgmath.h header filetoascii functiontolower functiontoupper functionTRUE macrotypedef commandu output conversion specifierungetc functionunion typeunlink functionunsigned char typeunsigned int typeunsigned long long typeunsigned long typeunsigned short typevoid typevolatile typewhile commandwrite functionX input conversion specifierx input conversion specifierX output conversion specifierx output conversion specifierz input conversion specifier modifierZ output conversion specifier modifierz output conversion specifier modifier| (pipe symbol)| bitwise operator| bitwise operator truth table|= bitwise operator~ bitwise operator~ bitwise operator truth table
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