He aha te mea Pascal. Papatonotanga i roto i Pascal

He aha te mea Pascal? he rota rawa o te iwi ui tenei take. Fele, he iwi e whakamahi i te rorohiko i te taumata taketake enei. Pascal - Ko tetahi o nga reo hōtaka tino rongonui tenei. Ako reira, te tikanga i roto i te kura nui ranei i roto i nga wehenga tuatahi o wānanga. Kei te whakaaro te reira i te pūtake mo te maha ētahi atu reo hōtaka.

kōrero

He aha te mea Pascal, kua kitea e matou i roto i. puta inaianei tatou tika ki te hītori o tona putanga me te whanaketanga. Kaihanga Reo - Niklaus Wirth. I whakawhanakehia te reira i roto i te wā i 1968 ki te 1969. Pascal te hanga i te whakaaro ka haere mai ki a ia i muri i te haere i te komiti motuhake i runga i te whanaketanga o te reo. He aha te mea Pascal, he reira ngā ki maha hötaka tauhou. huaina tenei ingoa he reo i muri te pūtaiao rongonui French Blaise Pascal, i te mea tino rongonui hoki te hanganga o te mīhini aunoa, whakarāpopoto e rua tau.

Ko te whakaputanga tuatahi o te mea Pascal, puta i roto i 1970. korero ratou e pā ana ki te whakaaro matua o te hanga tenei reo, pērā i te kakama, e e whai wāhi ki ngā pūkenga hōtaka pai, me te hanganga raraunga.

Ko te reo te whakatinanatanga

• UCSD Pascal. whakapumautia tenei pūnaha i roto i 1978. puta te reira i tauranga e taupatupatu e taea ki a koe waehere kawe, a taea inaianei te whakatika te pūnaha taketake, me pera i runga i. I muri mai ka UCSD te pūtake mo te maha implementations Pascal muri.
• Ahanoa Pascal. Papatonotanga i roto i Pascal kua ngā tonu maha ngaio taitamariki. I roto i te 1986, hanga Apple reo toronga ahanoa. whai wāhi te rōpū i roto i te whanaketanga, whakaaro ki te "papa" o Pascal.
• Turbo Pascal. puta te putanga tuatahi o te IDE i 1983. Borland ko te kamupene i i whai wāhi i roto i te whanaketanga o tenei whakatinanatanga. Heoi, kia tuhia te reira e nui tono Turbo Pascal i Odject Pascal, me i whānui, i rite enei implementations. Papatonotanga i roto i Pascal e hiahia me Microsoft. Tata i te wa ano, tukua ratou ratou ake putanga o te reo ahanoa e hāngai ana i runga i Pascal. kihai i taea e ia te tiki i te tohatoha papatipu, a ka hohoro wareware. I muri, te whakatinanatanga o i huaina Ahanoa o Borland Pascal.
• Ahanoa Pascal tenei ra. Ko te taahiraa tino mahu'inga i roto i te hītori o Pascal ko te tukua o implementations free. ngā ratou te pai katoa i maha atu reo. tapaea ratou hototahi pai ki te nuinga o ngā pūnaha whakahaere.

āhuatanga

Taunga ki te reo Pascal he tika ki te tīmata me ona āhuatanga. Nui i roto ia ratou - te pakeke patopato me te aroaro o te hōtaka hanganga. Pascal - te tuatahi o tenei momo o te reo. whakaaro ia te kaiwhakawhanake, me whai wāhi te reo hōtaka ako, mai i waho i te reira nui taea he momo o hapa wetereo, me te hakari he atanga pūmanawa. He aha te mea Pascal, me aha e ona āhuatanga matua - te take matua o te moni ki te tīmata. Ko tino ohie te reo noa mo te tīmatanga.

Tuatahi, Heoi, ko te reo he maha o huakore. Tino i roto ia ratou: ko te ngoikore ki te mahi ki te mahara hihiri, pukapuka IO poto, te kore o moni ki te whakahaere i te mahi hanga i roto i te tahi atu reo, a na i runga i. He aha te mea Pascal, he tino ohie nei te reo, i roto i te 80 wawe ', kua ako maha tohunga. Heoi, e kore katoa o reira ka haere mai ki te pangia e. ara tuhituhi ētahi tohunga tuhinga e i pania i roto i te taipitopito e pā ana ki i ia kore o te reo.

Kohakore, me te whakatikatika ia ratou

Ka rite ki te maha atu reo hōtaka, te whakamanamana Pascal i te painga e kore anake, engari ano hoki kino nui. kia mea te reira e māmālie ngā aro ki huakore, engari ko reira kore ratou mahi tonu.

Ka rite ki te nui rite kia tangi ai, engari ehara i te mea hē reo nohinohi te tauturu hötaka i roto i te whakangungu. I tua atu, Pascal i te 80 ko te taahiraa nui mua i roto i te rite ki Fortran, e i taua wa ako nga manene. Rawa i Fortran atu raruraru. I roto i te wā poto rawa o te wā, kua whakahaere Pascal ki te riro i te reo matua mō te whakaako i roto i te maha ngā kura me ngā whare wānanga. whakawhanakehia I tona turanga i maha ngā hōtaka.

hanganga

Mō Pascal taea e koe te tuhituhi te rota, engari kia haere i te reira tika ki te tukanga hōtaka. Ia tono i roto i te Pascal haamata ki te kupu matua (Program). i muri tonu i te ingoa hōtaka tohua, a ka hoatu ";". I ētahi wā e kore te tenei hiahiatia. I muri i te ingoa, ka taea e koe te whakapūtā te rārangi o ngā kōnae waho e ka tākaro ngā tawhā. I muri i taua mai te nui tino i roto i te hōtaka - tona tinana. Kei a ia ko wāhanga whakaahuatanga o taimau, momo, taurangi, ngā tukanga me ngā mahi. I muri ratou i reira he he poraka o tauākī - te wāhi tomokanga. Kei kōwae operator te i waenganui i nga kupu matua timata me te mutunga. wehea ia tauākī e te kopipiko. Hei whakamutu i te hōtaka whakamahi i te wāhi whakanohoia e te i muri i te tinana.

kōwae Taupānga

Hoki te kōwae tono i roto i te waehere hōtaka me kia hakari hei pānuitanga mo reira. Ki te hanga he fanongonongo taua, ka taea e koe te whakamahi i te tohutohu hononga, i te mea whakamahi te kupu matua. I muri ia ia, kia kia hono te ingoa o kōwae. tomo tonu Tohutohu i muri i te pane ranei i roto i te wāhanga atanga.

e kore e ētahi implementations tautoko te kōwae reo, putanga rawa pakeke. Ka taea te wehea ratou ki e rua ngā momo: pūmanawa me te tautoko. Ko te tuatahi he reira i roto i tīmata te hōtaka ki te hōtaka kupu matua. Ko te tuarua ngā taurangi, taimau, momo, me te kia i runga i, e taea te whakamahi i roto i te tahi atu kōwae.

tohutuhi

titau wetereo Pascal hanganga ture tino.

• Kopipiko. Whakanohoia i i te mutunga o te pane, i muri i te whakaahuatanga o te taurangi. ngā wehea i reira. E kore e taea e koe te whakamahi i te mua o te mutunga kupu matua.
• Piko. Whakamahia rite te whakawehe i roto i te whānuitanga o ngā rārangi.
• Point. Whakanohoia i i te mutunga o te tinana hōtaka (i muri i te kupu mutunga).

he tika wetereo mārō pērā no te mea whakaaro te rorohiko te ki kia mahi te tono. I roto i te take o te huru hē whakaatu he hapa. Ki te mahi te kopipiko rite te whakawehe tauākī, whakaaro te operator te ki hei te kuputuhi katoa i waenganui i tetahi ira me nga wāhi muri. I roto i te take o te nepostanovki tohu i waenganui i ngā, ka tangohia te hōtaka ratou tetahi, me te whakaputa i te hapa.

taea reo Pascal ki a koutou te kōkuhu kōrero. te mahi ratou rite te whakamārama ki te waehere hōtaka. Ka taea e koe te whakamahi i te reo Russian. I runga i te hōtaka e kore kōrero e hua i tetahi pānga.

I roto i Pascal, ka taea e koe te tuhituhi e rua pūriki me reta pūmatua. Ko ake ki te kaihātepe te kōwhiringa.

faaino

Ka rite ki kua kī, ka haere mai te rongonui motuhake o Pascal i 1980-1990, engari i reira nga fakaangá e whakaaro reo hauwarea. I roto i to ratou tirohanga, he reira pai anake mo te whakangungu. Rawa whakaahuatia faaino nui i roto i te tuhinga "He aha e kore ko Pascal toku reo hōtaka tino." I tuhituhi e Brian Kernighan - tetahi o nga ngā o C. ko reira i muri tuhinga Pascal timata ke tino mo te pai.

Ahakoa nga tōnounou katoa, te akina tino i runga i Pascal huru tüao o hötaka maha.