2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
STR06- C . Cov C muaj nuj nqi strtok() yog astring tokenization muaj nuj nqi uas yuav siv ob qho kev sib cav: aninitial hlua yuav tsum tau parsed thiab const -qualified characterdelimiter. Nws xa rov qab tus taw tes rau thawj tus cim ntawm tus tokenor mus rau tus pointer null yog tias tsis muaj token.
Tsis tas li ntawd, Sscanf hauv C yog dab tsi?
Cov sscanf ua () Ua haujlwm hauv C Cov sscanf ua () muaj nuj nqi tso cai rau peb nyeem cov ntaub ntawv los ntawm ib txoj hlua es tsis yog tus qauv tswv yim orkeyboard. Nws syntax yog raws li nram no: Tus so ntawm cov lus sib cav ntawm sscanf ua () zoo ib yam li scanf(). Nws rov qab cov naj npawb ntawm cov khoom nyeem los ntawm txoj hlua thiab -1 yog tias muaj qhov yuam kev.
Qhov thib ob, Strdup yog dab tsi? Cov strdup ua () muaj nuj nqi faib txaus nco rau ib daim qauv ntawm txoj hlua str, ua daim ntawv, thiab xa rov qab apointer rau nws. Lub strndup() muaj nuj nqi luam ntawm feem ntau len cim los ntawm txoj hlua str ib txwm null terminating the copiedstring.
Kuj paub, dab tsi yog token hauv C lus?
Token yog cov ntsiab lus tsawg tshaj plaws ntawm a qhov kev pab cuam , uas yog lub ntsiab lus rau lub compiler. Cov hauv qab no yog cov hom cov cim : Keywords, Identifiers, Constant, Strings, Operators, etc.
Dab tsi ua haujlwm yog siv los faib cov hlua hauv C?
char str = "strtok yuav tsum tau hu ob peb zaug rau cais a txoj hlua "; Cov lus sib cais los ntawm qhov chaw. Sospace yuav yog peb tus lej.
Pom zoo:
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