Video: Enum hlua yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Enum yog chav kawm paub daws teeb meem uas suav nrog cov txheej txheem pabcuam zoo li qub los ua haujlwm nrog enums . Rov qab ib qho array ntawm qhov tseem ceeb ntawm tag nrho cov tsis tu ncua ntawm qhov teev enum . object Parse(hom, txoj hlua ) converts cov txoj hlua kev sawv cev ntawm lub npe lossis tus lej tus nqi ntawm ib lossis ntau tus lej suav nrog rau ib qho khoom sib npaug.
Nyob rau hauv no hais txog, yuav ua li cas koj nrhiav tau tus enum ntawm ib txoj hlua?
Koj tuaj yeem tsim Enum los ntawm String los ntawm kev siv Enum . valueOf() method. valueOf() yog ib txoj kev zoo li qub uas tau ntxiv rau txhua qhov Enum chav kawm thaum lub sij hawm compile thiab nws yog implicitly muaj rau tag nrho cov Enum nrog rau qhov tseem ceeb(), lub npe() thiab cardinal() txoj kev.
tus nqi enum yog dab tsi? Hauv computer programming, ib hom enumerated (tseem hu ua kev suav sau , enum , los yog qhov tseem ceeb hauv R programming lus, thiab ib qho categorical variable nyob rau hauv kev txheeb cais) yog ib hom ntaub ntawv uas muaj cov npe ntawm tus nqi hu ua element, member, enumeral, or enumerators of type.
Hauv txoj kev no, kev siv enum yog dab tsi?
Enumeration (los yog enum ) yog tus neeg siv txhais cov ntaub ntawv hauv C. Nws yog siv los muab cov npe rau qhov tsis sib xws, cov npe ua kom yooj yim nyeem thiab tswj. enum Xeev {Ua haujlwm = 1, Ua tsis tiav = 0}; Lo lus tseem ceeb ' enum ' yog siv los tshaj tawm cov npe tshiab hauv C thiab C ++.
Enum sawv rau dab tsi?
xov tooj daim ntawv qhia
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