C语言学习第八章(英文版)课件.ppt

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1、Chapter8CharactersandStrings8.1Introduction8.2FundamentalsofStringsandCharacters8.3CharacterHandlingLibrary8.4StringConversionFunctions8.5StandardInput/OutputLibraryFunctions8.6StringManipulationFunctionsoftheStringHandlingLibrary8.7ComparisonFunctionsoftheStringHandlingLib

2、rary8.8OtherFunctionsoftheStringHandlingLibrary8.9Two-DimensionalArrayofCharacters8.10ArrayofPointerstoStringsOutlineFundamentalsofStringsandCharactersStandardInput/OutputLibraryFunctionsStringManipulationFunctionsoftheStringHandlingLibraryKeyPoints8.1IntroductionIntroduces

3、omestandardlibraryfunctionsEasystringandcharacterprocessingProgramscanprocesscharacters,strings,linesoftext,andblocksofmemoryThesetechniquesusedtomakeWordprocessorsPagelayoutsoftwareTypesettingprograms8.2FundamentalsofStringsandCharactersCharactersBuildingblocksofprogramsEv

4、eryprogramisasequenceofmeaningfullygroupedcharactersCharacterconstantAnintvaluerepresentedasacharacterinsinglequotes'z'representstheintegervalueofzStringsSeriesofcharacterstreatedasasingleunitCanincludeletters,digitsandspecialcharacters(*,/,$)Stringliteral(stringconstant)-w

5、rittenindoublequotes"Hello"StringsarearraysofcharactersStringapointertofirstcharacterValueofstringistheaddressoffirstcharacter8.2FundamentalsofStringsandCharactersStringdeclarationsDeclareasacharacterarrayoravariableoftypechar*charcolor[]="blue";char*colorPtr="blue";Remembe

6、rthatstringsrepresentedascharacterarraysendwith''colorhas5elementsInputtingstringsUsescanfscanf("%s",word);Copiesinputintoword[]Donotneed&(becauseastringisapointer)Remembertoleaveroominthearrayfor''8.2FundamentalsofStringsandCharactersAnarrayofcharactersUsedtostoretextA

7、notherwaytoinitialize:charstr[]="Text";Insteadofcharstr[]={‘T’,’e’,’x’,’t’};8.2FundamentalsofStringsandCharactersWheredoesitend?'s''#''''f''d''y''4''7''$''_''e''g''d''.''p''v'….….'H''e''l''l''o''''w''o''r''l''d''g''d''.''p''v'….….'H''e''l''l''o''''w''o''r''l''d''d''.''p''v'

8、….….''Terminatorstr8.2FundamentalsofStringsandCharactersStringsterminatewiththe'