Format specifiers txhais hom ntaub ntawv los luam tawm ntawm tus qauv tso zis . Koj yuav tsum siv hom ntawv specifiers seb koj puas luam tawm cov ntawv tawm nrog printf lossis lees txais cov tswv yim nrog scanf scanf Ib txoj hlua scanf hom (scan formatted) yogtus tswj tsis tau siv ntau yam haujlwm los qhia qhov layout ntawm ib txoj hlua input.. Cov haujlwm tuaj yeem faib cov hlua thiab txhais ua qhov tseem ceeb ntawm cov ntaub ntawv tsim nyog. String scanning functions feem ntau muab rau hauv cov tsev qiv ntawv txheem. https://en.wikipedia.org › wiki › Scanf_format_string
scanf hom hlua - Wikipedia
. Qee qhov % specifiers uas koj tuaj yeem siv hauv ANSI C yog raws li hauv qab no: Specifier.
Dab tsi yog qhov tshwj xeeb hauv kev ua haujlwm?
Access modifiers (los yog nkag mus rau cov specifiers) yog cov lus tseem ceeb hauv cov lus taw qhia uas teeb tsa kev nkag mus tau ntawm cov chav kawm, txoj hauv kev, thiab lwm tus tswv cuab. Access modifiers yog ib feem ntawm cov programming lus syntax siv los pab txhawb lub encapsulation ntawm Cheebtsam.
txhais tau li cas los ntawm hom ntawv tshwj xeeb hauv c?
Tus qauv qhia tshwj xeeb yog siv thaum lub sijhawm nkag thiab tawm. Nws yog ib txoj hauv kev los qhia rau lub compiler seb hom ntaub ntawv twg yog qhov sib txawv thaum siv cov tswv yim siv scanf lossis luam ntawv siv printf. Qee qhov piv txwv yog %c, %d, %f, thiab lwm yam.
Yuav ua li cas muaj pes tsawg hom specifiers muaj nyob rau hauv c?
Tus float, ob, thiab ntev ob hom specifiers yog hu uafloating los yog floating-point hom. Koj tuaj yeem siv ib qho tseem ceeb lossis floating-point specifier hauv qhov sib txawv lossis kev tshaj tawm ua haujlwm. Yog hais tias hom-specifier tsis tau muab rau hauv kev tshaj tawm, nws raug coj los ua int.
Printf specifier yog dab tsi?
The printf function sau cov hlua taw qhia los ntawm hom ntawv rau stdout. Txoj hlua hom yuav muaj cov qauv tshwj xeeb pib nrog % uas tau hloov los ntawm cov txiaj ntsig ntawm qhov sib txawv uas tau dhau mus rau qhov kev ua haujlwm printf raws li kev sib cav ntxiv.
