Delphi pos - umugqa e Pascal

Ngo Delphi, njengoba nganoma ngaluphi ulimi izinhlelo bangasebenza amayunithi wezinhlamvu. Kukhona izici eziningi ukusebenza nabo. Kulesi sihloko sizohlola ethandwa kakhulu Delphi string imisebenzi.

Ukuthola umlingisi yezinhlamvu

Ngo Delphi pos isetshenziswa ukuthola isikhundla uhlamvu noma iqembu lezinhlamvu kuyunithi yezinhlamvu. Lokhu umsebenzi isetshenziswa ngendlela elandelayo: pos (string oyifunayo umugqa, okuyinto owufunayo). Ngokwesibonelo, igama elithi "okuzenzakalelayo" sidinga ukuthola incwadi "O". Bhala pos ( 'a', 'okuzenzakalelayo'). Phakathi ekukhishweni ohlelweni endaweni lo msebenzi ngeke ukuthola 4. Njengoba O ncwadi elithi "umshini" umi endaweni 4th. Kumbe siyayivusela ukuthola ingxenye abalingiswa. Igama elithi "seziqa" thola "dil". Pos ( 'dil' 'imbala'). Libuyela ukuba 5, njengoba Diehl ndima iqala izinhlamvu 5. Uma umdlali noma izinhlamvu zokuqala string obuphelele musa, elibuyiswa umsebenzi 0. Kubalulekile futhi ukukhumbula ukuthi izinhlamvu a no - zihlukile, ngakho uma udinga ukuthola zonke izinhlamvu igama, funa kokubili A no A.

imisebenzi Okunye in eDelphi

Ngaphandle nje kokuthi pos umsebenzi Delphi kuhlanganisa sebuningini imisebenzi ukuxhaphaza izintambo. Ngokwesibonelo, ukopishe umsebenzi. Isetshenziselwa ukukopisha endaweni ethile eyodwa string kwenye. umsebenzi CONCAT ikhonza skleyschikom imigqa emibili. Njengoba izibalo izinombolo ezimbili kunezelwa, kumugqa ofanayo axhunyiwe komunye nomunye.

izinqubo String in eDelphi

Umsebenzi kuhlale kunokuthile ukubuyela kodwa kunemidanti - akukho. Isibonelo umucu izinqubo zingakhiqiza kufakwe nokususwa nezinqubo. Susa inqubo ingase isuse ngemvuthuluka yezinhlamvu. A Faka - ukufaka. Ngekhono ngokuhlanganisa lezi izinqubo, kanye ngokusebenzisa umsebenzi, ongayifinyelela miphumela emihle kakhulu, isibonelo, usebenze zonke umqondisi iphutha, okuyinto dwebela amagama elibhalwe kabi bese ukulungise, abahumushi, izichazamazwi kanye nokuningi. Bonke ukusebenzisa imisebenzi string, kodwa cishe hhayi Pascal. Ukwazi imisebenzi yezinhlamvu kanye nezinqubo kungaba, isibonelo, ukubhala uhlelo kuboniswe sibalo ngenhla.