Ndi mitundu posonkhanitsa deta Pascal chiyani?

Pamene mapologalamu mu Pascal (Pascal) ayenera anasankha mitundu deta Pascal pulogalamu. The mapulogalamu nkofunika tonse timvetsetse kuti kuthamanga pulogalamu yake malo osungira osati magulu allocated mu kukumbukira, koma deta imene malamulo a ntchito.

Mitundu yonse posonkhanitsa deta Pascal anawagawa m'magulu awiri: yosavuta ndondomeko. Pakuti aliyense mtundu deta ndi nambala ina ya mabayiti. Kwa mitundu achidule: mitundu inteja (mamvekedwe, inteja, etc.), mitundu Zofunika (weniweni, mbeta, etc.), Buliyani (Buliyani), mtundu khalidwe (gale-), anafotokoza ndi imeneyi mtundu. Onse a iwo, kupatula mtundu weniweni mitundu ordinal ndi yodziwika chakuti mukhale ndi zochepa mfundo analamula. Mwachitsanzo, variable ndi mtundu mamvekedwe, akhoza kutenga mfundo kuyambira 0 kuti 255 palimodzi. Deta yotere ndi mitundu mu Pascal kulola kutsatira ntchito Pred (linaŵerengera mtengo yapita) ndi Succ (computes mtengo otsatirapo), Low (vychislyaetet zing'onozing'ono mtengo mtundu) ndi High (linaŵerengera yaikulu mtundu phindu), Ord (ref linaŵerengera phindu panopa nambala variable).

Mwina ngati mfundo mtundu wophweka ali chimodzi chokha datum, i.e. wina inteja, nambala fractional kapena chophiphiritsa. Zosintha ndi mitundu yosavuta deta Pascal ayenera anafotokoza mu chigawo var (chidule cha zosintha -. Zosintha).

The variable mu msonkhanowo Pascal ankaona kuti mwachindunji kwathunthu, ngati ali ndi dzina (ID), mtundu ndi kufunika koyamba. Dzina la variable ndi ntchito pofotokoza kuti ndi woyendetsa iliyonse. Mtundu deta n'chakuti chifaniziro osiyanasiyana (awa angathe kutenga mfundo variable), ntchito imene amagwira nawo, kuchuluka kwa kukumbukira wofunikila kasungidwe ndi variable m'chikumbumtima. Choncho, kuthetsa vutolo ayenera amakonda kuchepetsa chiwerengero cha zosintha ndi masankhidwe zomveka mitundu.

Mitundu Structured ndi anatilamula ya zosintha mitundu yosavuta. Zikuphatikizapo: lomenyera (osiyanasiyana), waika (ya), chingwe (chingwe), owona (file), mbiri (mbiri). Mitundu Structured posonkhanitsa deta Pascal yafotokozedwa mu mtundu gawo (Ndime mtundu malongosoledwe).

Zungulirani - mitundu yofala zosanjidwa, ntchito pamene mukufuna kusunga ndi pokonza analamula ya zosintha wa yofanana (mtundu uliwonse yosavuta). Magulu mmodzi azithunzi omwe tikunena awiri, ooneka enieni, Mipikisano ooneka enieni. Chitsanzo cha khamu limodzi azithunzi omwe tikunena atha kutumikira ngati mndandanda wa ophunzira mu magazini m'kalasi, zosankhidwa kuti afabeti, pamene wophunzira aliyense ali wapadera siriyo chiwerengero. Chitsanzo cha khamu ziwiri ooneka enieni - malo a mipando mu holo mafilimu a kanema (chilichonse mpando anatsimikiza ndi miyezo iwiri - motsogozana chiwerengero mpando chiwerengero).

Zinthu za mosiyana disordered osiyanasiyana, ndipo chiwerengero cha zinthu zambiri kwa 255. Chingwe tichipeza anatilamula ya anthu ndiponso ndi zofanana kwambiri ndi khamu Komabe, okha zizindikiro kungakhale zinthu za mzere.

Wapamwamba - ichi ndi khamu chomwecho, koma chiwerengero cha zinthu zina zikhoza asinthe mwambowu. Kujambula ndi ya osiyanasiyana deta.

Mwa kuphunzira kugwiritsa ntchito mitundu posonkhanitsa deta Pascal, akhoza akuyendera zinthu zovuta kwambiri ndiponso zosangalatsa.