Yog li, feem ntau, getters tuaj yeem ua tau raws li lawv tsis hloov qhov khoom lub xeev. Setters yuav tsum tsis yog const.
Yuav tsum C++ getters const?
Qhov no yuav rov qab los, thiab nws lav tias lub xeev logic ntawm koj cov khoom yuav tsis hloov. Nyob rau hauv cov ntaub ntawv no nws tsis yog yuav tsum tau sau const nyob rau hauv pem hauv ntej ntawm lub rov qab hom. Nws ua rau tsis muaj kev nkag siab rov qab const bool vim nws yog daim ntawv lawm. Yog li ua nws const tsis muaj txiaj ntsig.
Yuav tsum accessor functions muaj tus hloov kho const?
Cov xibfwb tau hammered rau hauv kuv lub taub hau thaum kuv nyob hauv tsev kawm ntawv, cov neeg koom tes tau dhia kuv caj pas rau nws ntawm kev tshuaj xyuas cov lej, thiab nws zoo nkauj npaum li txhua phau ntawv C ++ tawm muaj: "tus neeg siv" (aka "selector" lossis " getter") txoj kev yuav tsum tau cim const. Yog nws tsis hloov lossis hloov cov ntaub ntawv, ces kos nws const.
Yuav ua li cas ua tau const?
Ib txoj haujlwm dhau los ua const thaum lo lus tseem ceeb const siv rau hauv cov haujlwm tshaj tawm Lub tswv yim ntawm const functions tsis yog tso cai rau lawv hloov cov khoom uas lawv hu ua. Nws raug pom zoo rau kev xyaum ua kom muaj ntau txoj haujlwm const raws li qhov ua tau kom tsis txhob muaj kev hloov pauv rau cov khoom raug zam.
Puas yog xyaum siv const?
const yog ib qho kev ua haujlwm sib txawv. Kev xav txog qhov sib txawv const yog yooj yim dua (piv rau cia) vim tias koj paub tias qhov sib txawv const yuav tsis hloov. Kev xyaum zoo thaum xaiv hom kev tshaj tawm ntawm qhov sib txawv yog xav tau const, txwv tsis pub siv.
