Yiziphi izinhlobo idatha ku Pascal?

Lapho uHlelo e Pascal (Pascal) Kufanele kukhethwe izinhlobo idatha yohlelo Pascal. UMklami kubalulekile ukuqonda ukuthi ukuze sigijime isikhala yayo Uhlelo ukugcina hhayi kuphela amaqembu abiwa inkumbulo, kodwa idatha lapho le miyalo ukusebenza.

Zonke izinhlobo idatha ku Pascal zihlukaniswe amaqembu amabili: elula ehleliwe. Ngayinye uhlobo idatha unikezwa inombolo ethile amabhayithi. Ukuze izinhlobo elula yilezi: inamba izinhlobo (Byte, ephelele, njll), izinhlobo Material (Okuyınqo, eyodwa, njll), Izimiso eziphusile (eziphusile), uhlamvu hlobo (wezinhlamvu), wabalula kanye nohlobo isikhawu. Bonke ngothi lwabo, ngaphandle uhlobo zangempela izinhlobo odinali ne zinezikhathi ngokuthi isethi elilinganiselwe amagugu ngaphambilini. Ngokwesibonelo, kwenombolo kokuba uhlobo ibhayithi, kungathatha amagugu ezisukela 0 kuya 255 kukonke. Lezi zinhlobo idatha ukuvumela ukuthi ufake isicelo Pascal umsebenzi Pred (sinquma ukubaluleka kwangaphambilini) Succ (ubalisisa ukubaluleka olandelayo), okuphansi (vychislyaetet aphansi Inani lohlobo), kanye High (ubalisisa kufike komkhulu wabo Inani lohlobo), Ord (ubalisisa inombolo okwesingaki we Inani lamanje le-variable).

Ngokwengxenye elula uhlobo amagugu has Datum eyodwa kuphela, okungukuthi eyodwa inombolo ephelele, inombolo wamaqhuzu noma uphawu. Eziguquguqukayo ube elula izinhlobo idatha, Pascal kumele ezichazwe Var kwesigaba (esifushane eziguquguqukayo -. Eziguquguqukayo).

I okuguquguqukayo kohlelo Pascal kubhekwe ukuthi icaciswe ngokugcwele, uma unegama (i-ID), uhlobo ukubaluleka kokuqala. Igama variable lisetshenziswa ukuze libhekisele kuwo nganoma iyiphi opharetha. Uhlobo lwedatha acacisa ukumelwa ububanzi (okungathatha amagugu variable), imisebenzi lapho kungase abathintekayo, inani lememori adingekayo igcina okuguquguqukayo inkumbulo. Ngakho-ke, ukuxazulula inkinga kufanele bathambekele ukunciphisa inani eziguquguqukayo kanye Ukukhetha okunengqondo izinhlobo.

izinhlobo ehleliwe kukhona isethi ngaphambilini lokwehlukile ezinhlobo elula. Lezi zihlanganisa: afanayo (ilungu elifanayo), amasethi (iqoqo), string (string), amafayela (ifayela), irekhodi (arekhode) ukuthintana. Ehleliwe izinhlobo idatha ku Pascal zichazwe uhlobo kwesigaba (kwesigaba uhlobo incazelo).

Array - lwezinhlobo ezivame kakhulu ehlelekile, kusetshenziswa uma ufuna ukugcina bese ukucubungula isethi ngaphambilini lokwehlukile yohlobo olufanayo (yiluphi uhlobo elula). Afanayo ungomunye-ntathu, ababili-ntathu, multi-ntathu. Isibonelo afanayo eyodwa-ntathu singasebenza njengesisekelo esiqinile sokufinyelela uhlu abafundi umagazini ekilasini, ihlelwa ngokulandelana kwama-alfabhethi, lapho umfundi ngamunye has a nenombolo ye-serial esiyingqayizivele. Isibonelo afanayo mgudumbili - indawo izihlalo ehholo cinema (esihlalweni ngasinye kunqunywa izilinganiso ezimbili - irowu kanye nenombolo esihlalweni inombolo).

Izinto ngokungafani afanayo disordered, futhi inani izakhi kukhawulwe 255. Iyunithi siqukethe iqoqo ngaphambilini abalingiswa kanye ke kuyafana array Nokho, kuphela izimpawu kungaba izakhi komugqa.

Ifayela - lokhu elifanayo, kodwa inani izakhi ukuthi singakwazi ukushintsha inkambo ohlelweni. Ukurekhoda iqoqo izinhlobo ezahlukene zedatha.

Ngokufunda ukusebenzisa izinhlobo idatha ku Pascal, ezingase zithathwe imisebenzi ngempela eziyinkimbinkimbi futhi ezithakazelisayo.