Qhov Tseem Ceeb Qhov txawv - C vs Lub Hom Phiaj C
Cov lus programming muaj txiaj ntsig los tsim cov lus qhia muaj txiaj ntsig rau lub khoos phis tawj ua haujlwm tshwj xeeb. Ob hom lus siv dav dav yog C thiab Lub Hom Phiaj C. Lub Hom Phiaj C yog raws li hom lus C. Yog li ntawd, C cov kev pab cuam tuaj yeem muab tso ua ke thiab ua haujlwm raws li Lub Hom Phiaj C. Lub Hom Phiaj C muaj qhov tseem ceeb C nrog rau cov ntsiab lus taw qhia cov ntsiab lus, kev xa xov, cov txheej txheem thiab lwm yam. Qhov txawv ntawm C thiab Lub Hom Phiaj C yog qhov C yog hom lus programming thiab Lub Hom Phiaj. C yog ib hom lus ntau lub ntsiab lus uas yog ib qho superset ntawm C. Lub Hom Phiaj C feem ntau txhawb kev cuam tshuam thiab cov phiaj xwm phiaj xwm phiaj xwm.
C yog dab tsi?
C yog hom lus programming dav dav. Dennis Ritchie pom C hom lus thaum tsim UNIX operating system. Nws yog lub hauv paus programming lus rau ntau yam lus xws li Java, Python, C thiab lwm yam. Nws yog ib hom lus programming. Tus programmer tuaj yeem siv cov haujlwm thiab rov ua haujlwm hauv coding. C tsis txhawb nqa cov phiaj xwm taw qhia. Lub hauv paus code sau ua lus C yog to taub los ntawm tib neeg thiab tsis to taub los ntawm lub computer. Yog li ntawd, lub hauv paus code yog hloov dua siab tshiab rau hauv tshuab lus siv lub compiler. Ib tug nquag siv compiler yog GNU C / C ++ compiler. Ib tug yuav tsum xav tau ib phau ntawv editor thiab compiler los khiav C cov kev pab cuam los yog siv ib tug Integrated Development Environment (IDE).
Hauv C, lub ntsiab() yog qhov pib ua tiav. C muaj ntau hom ntaub ntawv rau qhov sib txawv xws li int, ntab, ob npaug, char, thiab lwm yam. Muaj kuj muaj arrays, qauv, enums thiab unions. Nws yog ib qho tsim nyog yuav tsum tshaj tawm cov ntaub ntawv sib txawv hauv C. Undeclared variables ua yuam kev. Constants tuaj yeem txhais tau siv "const" lo lus tseem ceeb lossis define preprocessor. C muaj plaub chav kawm khaws cia, uas piav qhia lub neej ntawm qhov hloov pauv lossis ua haujlwm. Lawv yog auto, register, static, thiab extern. Lub tsev qiv ntawv C tus qauv muab qee cov haujlwm ua haujlwm rau cov programmer siv hauv lawv cov coding. Piv txwv li, muaj cov haujlwm xws li strlen, strcpy, thiab strcat rau txoj hlua manipulation. Tsis tas li ntawd, tus programmer tuaj yeem tsim cov haujlwm raws li tus neeg siv.
C siv cov ntaub ntawv header. Lawv suav nrog cov lus tshaj tawm ua haujlwm thiab cov ntsiab lus macro. Muaj cov ntaub ntawv header uas tuaj nrog lub compiler, thiab muaj cov ntaub ntawv uas tau sau los ntawm programmer. Tsis yog luam thiab muab cov ntsiab lus ntawm cov ntaub ntawv header, tus programmer tuaj yeem suav nrog cov ntaub ntawv header. Piv txwv li,suav nrog. Ntawm no, cov lus txib qhia cov compiler kom suav nrog cov ntaub ntawv header “stdio.h”.
C muaj cov taw qhia. Nws yog ib lub tswv yim tseem ceeb los ua dynamic memory allocation. Ib tus pointer yog qhov sib txawv uas khaws qhov chaw nyob ntawm lwm qhov sib txawv. Tsis zoo li cov lus programming xws li C lossis Java, C tsis muaj cov khoom siv khib nyiab tsis siv neeg. Yog li ntawd, tus programmer yuav tsum ua dynamic memory allocation ntawm nws tus kheej. Cov haujlwm xws li calloc(), malloc(), realloc() thiab dawb() muaj nyob rau hauv cov ntaub ntawv header rau kev tswj hwm kev nco. C yog qhov muaj txiaj ntsig zoo rau kev tsim cov algorithms thiab feem ntau rau kev txhim kho cov ntawv thov kho vajtse. Nws yog siv rau embedded systems, network drivers thiab operating systems, thiab ntau ntxiv.
Lub Hom Phiaj C yog dab tsi?
Cov lus C programming tau qhia nyob ib puag ncig xyoo 1970. Nyob ib puag ncig xyoo 1980, ib hom lus hais lus Smalltalk tau qhia. Raws li C yog ib hom lus programming, nws tau xav tias yuav tsum muaj txiaj ntsig kom muaj cov khoom siv hom lus C thiab yog li, C ++ tau qhia. Lub sijhawm no, Apple tsim Lub Hom Phiaj C. Lub Hom Phiaj C tau tsim los ntawm kev tau txais cov tswv yim los ntawm Smalltalk thiab dov rau hauv hom C. Lub Hom Phiaj C yog tsuas yog siv rau IOS thiab Mac daim ntawv thov kev txhim kho. Cov lus programming xws li C thiab Java yog raws li C, tab sis lawv yog cov lus ywj pheej tab sis, Lub Hom Phiaj C yog C hom lus nrog cov hom phiaj-orientation thiab ntxiv nta. Nws yog superset ntawm C.
Objective C yog ib hom lus uas suav nrog. Daim ntawv sau tiav yog hloov mus rau hauv tshuab code. Zoo li hauv C, tus programmer siv tau cov ntawv nyeem thiab GCC compiler los khiav Objective C cov kev pab cuam. Lub compiler converts qhov chaws mus rau cov ntaub ntawv executable. Lub Hom Phiaj C muaj cov ntaub ntawv xws li int, ntab, ob npaug, cov koom haum, cov taw qhia, cov qauv thiab cov ntaub ntawv txuas ntxiv xws li NSArryas thiab NSDictionaries.
Objective C muaj cov chav kawm, khoom, kev xa xov, kev zam, khoom, thiab kev cai. Lub cim @ yog siv los qhia cov neeg sau txog cov syntax tshiab. Piv txwv li, C tsis muaj qhov sim, ntes, tab sis Lub Hom Phiaj C tau sim thiab ntes qhia siv @ cim. Lwm cov piv txwv yog @interface, @implementation, @property, @protocol.
Dab tsi zoo sib xws ntawm C thiab Lub Hom Phiaj C?
- Objective C yog raws li C.
- Ob leeg yog cov lus sau ua ke.
- Ob hom lus siv cov ntaub ntawv header.
- Cov lus ua ob hom lus xaus nrog lub cim.
- Lub compiler ignores whitespaces. Whitespaces tuaj yeem txhim kho cov lej nyeem tau.
- Ob leeg yog lus-sensitive.
- Tau txhais qhov tsis tu ncua siv define preprocessor thiab const lo lus tseem ceeb.
- Array index pib nrog xoom.
Qhov txawv ntawm C thiab Lub Hom Phiaj C yog dab tsi?
C vs Objective C |
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| C yog hom lus dav dav uas txhawb nqa kev ua haujlwm. | Objective C yog lub hom phiaj dav dav, ntau lub ntsiab lus (rov qab, hom lus taw qhia) programming thiab yog superset ntawm hom lus C. |
| Object Orientation | |
| C tsis txhawb Object Oriented programming. | Objective C txhawb nqa Object-oriented programming. Inheritance, Abstraction, Encapsulation thiab Polymorphism. |
| Data Types | |
| C muaj arrays, qauv, enums. | Objective C tau txuas ntxiv cov ntaub ntawv xws li NSArray, NSDictionary, NSSet thiab lwm yam. |
| nta | |
| C hom lus muaj lub voj, ua haujlwm, arrays, pointers thiab lwm yam. | Objective C yog superset ntawm C. Nws muaj C lub tswv yim thiab cov yam ntxwv tshiab xws li chav kawm, khoom siv, kev xa xov, kev zam thiab cov txheej txheem. |
| Applications | |
| C tau dav siv los tsim kho cov khoom siv ntsig txog kev siv xws li kev khiav haujlwm thiab cov tsav tsheb hauv network. | Objective C feem ntau yog siv rau Mac thiab IOS kev txhim kho daim ntawv thov. |
Summary – C vs Objective C
C thiab Lub Hom Phiaj C yog cov lus programming nrov niaj hnub no. Lub Hom Phiaj C yog superset ntawm C nrog cov khoom-orientation thiab ntxiv nta. Qhov txawv ntawm C thiab Lub Hom Phiaj C yog qhov C yog hom lus programming thiab Lub Hom Phiaj C yog ntau hom lus programming thiab yog superset ntawm C. Ob hom lus yog hom lus programming dav dav, tab sis lawv yog siv feem ntau rau hom lus tshwj xeeb. daim ntawv thov. C yog dav siv rau cov kab ke kos thiab kev ua haujlwm kev txhim kho thaum Lub Hom Phiaj C feem ntau yog siv rau IOS thiab Mac daim ntawv thov kev loj hlob.
Download the PDF Version of C vs Objective C
Koj tuaj yeem rub tawm PDF version ntawm kab lus no thiab siv nws rau offline lub hom phiaj raws li daim ntawv ceeb toom. Thov download PDF version ntawm no Qhov txawv ntawm C thiab Lub Hom Phiaj C
