Video: Puas yog daim ntawv hloov pauv xav tau lub neej ntawd?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Tsis yog nws tsis tsim nyog ntawm rooj plaub hauv a hloov nqe lus thiab tsis muaj txoj cai khaws cia rooj plaub Thaum kawg ntawm txhua kis nws tuaj yeem muab tso rau ntawm qhov pib thiabd nruab nrab ntawm txhua kis.
Tom qab ntawd, txhua daim ntawv hloov pauv puas xav tau lub neej ntawd?
xaiv hloov , " Hloov daim ntawv qhia ua tsis muaj ib rooj plaub "A hloov nqe lus tsis muaj ib rooj plaub tuaj yeem tso cai rau kev tua kom 'poob dhau' ntsiag to, yog tias tsis muaj qhov sib txuam.
Ib sab saum toj no, yuav tsum yog qhov xwm txheej kawg hauv nqe lus hloov pauv? Ib ' hloov ' nqe lus yuav tsum muaj ' ua ntej 'as cov kawg daim ntawv lo. Ntxiv ib ' ua ntej 'label tom kawg ntawm txhua tus' hloov ' nqe lus ua kom cov cai meej dua thiab lav tias txhua yam ua tau cas qhov twg tsis muaj ib qho ntawm cov ntawv sib tw nrog tus nqi ntawm kev tswj hwm qhov sib txawv yuav raug daws.
Tsuas yog li ntawd, lub neej ntawd yog dab tsi hauv daim ntawv hloov pauv?
Cov default nqe lus raug tua yog tsis muaj cas constant-expression yog sib npaug rau tus nqi ntawm hloov (hais lus). Yog tias default nqe lus raug tshem tawm, thiab tsis muaj cas match yog pom, tsis muaj qhov nqe lus hauv hloov lub cev raug tua. A cas los yog ua ntej daim ntawv lo tsuas tuaj yeem tshwm hauv ib hloov nqe lus.
Puas yog qhov yuav tsum tau ua nyob rau hauv cov ntaub ntawv hloov hauv C #?
Hauv C# , duplicate cas tsis pub muaj nuj nqis. Cov ntaub ntawv hom ntawm cov variable nyob rau hauv lub hloov thiab tus nqi ntawm a cas yuav tsum yog tib hom. Cov default nqe lus yog xaiv tau thiab nws yuav siv tau nyob qhov twg hauv lub hloov nqe lus . Ntau ua ntej tsis pub cov lus hais.
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