Peb puas tuaj yeem muaj tus lej hauv enum?

2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47

Enum tshaj tawm ua tau yuav tsum tau ua sab nraum chav kawm los yog sab hauv ib hoob tab sis tsis sab hauv ib txoj kev. // enum tshaj tawm sab hauv ib chav kawm. Thawj kab hauv enum yuav tsum yog cov npe ntawm qhov tsis tu ncua thiab tom qab ntawd lwm yam xws li txoj kev, hloov pauv thiab tus tsim.

Yog li ntawd, enum puas tuaj yeem muaj cov piv txwv sib txawv?

2.1 Tus tsim, tus tswv cuab Hloov pauv thiab Txoj Kev Koj tsis raug tso cai los tsim ib qho tshiab piv txwv ntawm enum siv tus neeg teb xov tooj tshiab, vim enum khaws ib daim ntawv teev npe tas mus li. enum 's piv txwv ua tau muaj nws tus kheej piv txwv variable (int vib nas this) thiab txoj kev (getSeconds()).

Tom qab ntawd, lo lus nug yog, thaum twg tus enum lossis enumeration yuav raug siv? Kev suav sau (los yog enum ) yog tus neeg siv txhais cov ntaub ntawv hauv C. Nws yog qhov tseem ceeb siv txhawm rau muab cov npe rau qhov tsis sib xws, cov npe ua kom yooj yim nyeem thiab khaws cia. enum Xeev {Ua haujlwm = 1, Ua tsis tiav = 0}; Lo lus tseem ceeb ' enum 'yog siv tshaj tawm tshiab kev suav sau hom hauv C thiab C ++.

Hauv qhov no, dab tsi yog enum nrog piv txwv?

Ib enum hom yog hom ntaub ntawv tshwj xeeb uas ua rau muaj qhov sib txawv los ua ib pawg ntawm cov ntawv teev tseg ua ntej. Qhov sib txawv yuav tsum sib npaug rau ib qho ntawm qhov tseem ceeb uas tau hais ua ntej rau nws. Feem ntau piv txwv suav nrog cov kab lus qhia (tus nqi ntawm NORTH, SOUTH, EAST, thiab WEST) thiab hnub ntawm lub lim tiam.

Puas yog enum cov ntaub ntawv qauv?

Hauv computer programming, ib hom enumerated (tseem hu ua enumeration, enum , los yog qhov tseem ceeb hauv R programming lus, thiab ib qho kev sib txawv hauv kev txheeb cais) yog a cov ntaub ntawv hom muaj xws li cov txheej txheem npe hu ua cov ntsiab lus, cov tswv cuab, enumeral, lossis tus lej ntawm hom.