Zeziphi ezi ntlobo data Pascal?

Xa lwenkqubo e Pascal (Pascal) kufuneka iintlobo inkqubo Pascal data ekhethiweyo. Uhlelo Kubalulekile ukuqonda ukuba ukuze usebenzise isithuba yayo inkqubo ukugcina kuphela amaqela eyabelwe kwinkumbulo, kodwa idata ezi imithetho ukusebenza kuyo.

Zonke Iintlobo data kwi Pascal bohlulwa babe ngamaqela amabini: elula structured. Kuba ngalunye uhlobo lwe data unikwa inani elithile bytes. Kuba Iintlobo alula: Iintlobo inani elipheleleyo (byte, inani elipheleleyo, njalo-njalo), iintlobo Material (real, omnye, njl), Boolean (boolean), uhlobo umlinganiswa (Isakare), wabalula kunye nohlobo lekhefu. Bonke bephela, ngaphandle uhlobo lokwenene iindidi olandelelwano kwaye zisingathwa ukuba babe iseti eliqingqiweyo amaxabiso odwa. Umzekelo, variable ukuba uhlobo byte, ungakwazi ukuthatha amanani ukusuka kwi-0 ukuya 255 ebandakanya wonke. Ezinjalo iindidi zedata e Pascal ukuvumela ukuba asebenzise umsebenzi pred (ubala ixabiso elidlulileyo) kunye Succ (computes ixabiso olandelayo), Phantsi (vychislyaetet incinane uhlobo kwexabiso) kunye High (ubala uhlobo ixabiso elikhulu), Ord (jonga ubala ixabiso yangoku inani bume).

Ngoncedo amaxabiso elula uhlobo umntu omnye kuphela Datum, ngamanye elinye inani elipheleleyo, inombolo iqhezu okanye uphawu. Nesebenzayo babe iintlobo data elula, Pascal kufuneka kuchazwe kwicandelo var (elifutshane variables -. Variables).

Variable kule nkqubo uPascal ingqalelo ukuba icaciswe ngokupheleleyo, ukuba unalo igama (ID), uhlobo kunye inani lokuqala. Igama variable lisetyenziswa ukubhekisela kuyo nayiphi na umqhubi. Uhlobo lwedatha acacisa imbonakaliso lomqolo (oko kungathatha amaxabiso eziguquguqukayo), imisebenzi apho uthatha inxaxheba, ubungakanani inkumbulo efunekayo okugcina variable kwinkumbulo. Ngoko ke, ukusombulula le ngxaki kufuneka badla ukunciphisa inani ezitshintshayo kunye nokukhethwa eyiyo kweentlobo.

Iintlobo eyakhiwe i iseti oda eziguquguqukayo iintlobo ezilula. Ezi ziquka: uluhlu (uluhlu), iiseti (iseti), umtya (umtya), iifayile (ifayile), ingxelo (irekhodi). iindidi zedata oluLungiselelweyo Pascal zichazwe kwi uhlobo kwicandelo (icandelo inkcazelo type).

Uluhlu - yeyona ixhaphakileyo structured iintlobo, kusetyenziswa xa ufuna ukugcina ukusebenza iseti wayalela eziguquguqukayo zohlobo olufanayo (naluphi na uhlobo elula). Ma banye-mbini,-mbini, multi emacala-. Umzekelo i uluhlu-liyajikeleza ayanceda uluhlu lwabafundi lowu eklasini, ezibekwe ngokwe-alfabhethi, apho umfundi ngamnye unenani unique serial number. Umzekelo uluhlu okuntlandlo-mbini - indlela indawo akuyo kwiholo bhanya ye (isihlalo ngasinye kumiselwa imilinganiselo emibini - inombolo umqolo kunye nenombolo isihlalo).

Le miba ngokungafaniyo uluhlu njengongekho, kwaye inani lweziqalelo kuphela 255. I umtya iquka iseti wayalela zabalinganiswa kwaye efana kakhulu uluhlu, Noko ke, kuphela iisimboli ukuba izinto emgceni.

Ifayile - oku ke uluhlu enye, kodwa ke inani izinto kulo ungatshintsha indlela yenkqubo. Ukurekhoda isethi iintlobo ezahlukeneyo ze data.

Ngokufunda ukusebenzisa iintlobo data e NjengoPascal, ukufezekiswa kwazo imisebenzi ngendlela entsonkothileyo umdla.