Video: Cov kwj C# yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Conceptually, lub C program deals nrog a ntws es tsis txhob ncaj qha nrog cov ntaub ntawv. A ntws yog ib tug zoo tagnrho ntws ntawm cov ntaub ntawv uas qhov tseeb input los yog tso zis yog mapped. Qhov ntawd txhais tau tias ntau yam kev tawm tswv yim nrog cov khoom sib txawv yog sawv cev los ntawm ntws nrog ntau yam khoom zoo sib xws.
Yog li ntawd, dab tsi yog cov ntaub ntawv ntws?
A ntws yog ib feem ntawm bytes. Hauv NTFS ntaub ntawv qhov system, ntws muaj cov ntaub ntawv uas sau rau a ntaub ntawv , thiab qhov ntawd muab cov ntaub ntawv ntxiv txog a ntaub ntawv tshaj tus cwj pwm thiab cov khoom. Piv txwv li, koj tuaj yeem tsim ib qho ntws uas muaj cov ntsiab lus tshawb nrhiav, lossis tus kheej ntawm tus neeg siv tus account uas tsim ib qho ntaub ntawv.
Dab tsi yog qhov predefined file kwj hauv C? Tus qauv ntws yog peb predefined kwj nruab nrab ntawm qhov kev pab cuam thiab tus tswv tsev ib puag ncig qhib thiab muaj rau siv los ntawm txhua tus C program thaum lub luag haujlwm tseem ceeb ntawm qhov program raug hu. Peb tus qauv ntws yog tus qauv input, standard output, thiab tus qauv yuam kev ntws.
Ntawm no, dab tsi yog input thiab output kwj hauv C?
File I/O Cov kwj deg hauv C Programming Language: Hauv C tag nrho input thiab output ua tiav nrog ntws . Kwj tsis muaj dab tsi tab sis qhov sib lawv liag ntawm bytes cov ntaub ntawv. Ib ntu ntawm bytes ntws mus rau hauv qhov program hu ua input ntws . Ib ntu ntawm bytes ntws tawm ntawm qhov program hu ua tso zis ntws.
Puas yog Stdio yog cov ntaub ntawv teev tseg ua ntej hauv C?
12.2 Standard Kwj Thaum lub luag haujlwm tseem ceeb ntawm koj qhov kev pab cuam raug hu, nws twb muaj peb predefined kwj qhib thiab muaj rau siv. Cov no sawv cev rau "tus qauv" tawm tswv yim thiab tso tawm cov channel uas tau tsim los rau cov txheej txheem. Cov no ntws tau tshaj tawm nyob rau hauv header file stdio.
Pom zoo:
Dab tsi yog qhov txawv ntawm cov khoom taw qhia cov qauv database thiab cov qauv kev sib raug zoo?
Qhov sib txawv ntawm kev sib raug zoo database thiab cov khoom taw qhia cov ntaub ntawv yog tias cov ntaub ntawv sib txheeb cov ntaub ntawv khaws cov ntaub ntawv nyob rau hauv daim ntawv ntawm cov ntxhuav uas muaj kab thiab kab. Hauv cov khoom taw qhia cov ntaub ntawv cov ntaub ntawv khaws cia nrog rau nws cov haujlwm uas ua los yog nyeem cov ntaub ntawv uas twb muaj lawm. Cov no yog qhov sib txawv hauv paus
Dab tsi yog input thiab output kwj?
Nyeem thiab sau cov ntaub ntawv. Raws li tau piav qhia ua ntej, cov kwj tuaj yeem txhais tau tias yog ib ntu ntawm cov ntaub ntawv. InputStream yog siv los nyeem cov ntaub ntawv los ntawm ib qhov chaw thiab OutputStream yog siv los sau cov ntaub ntawv mus rau qhov chaw. Ntawm no yog hierarchy ntawm cov chav kawm los cuam tshuam nrog Input thiab Output kwj
Dab tsi yog qhov txawv ntawm input kwj thiab tso zis kwj hauv Java?
InputStream yog siv rau ntau yam uas koj nyeem los ntawm. OutputStream yog siv rau ntau yam uas koj sau rau. InputStream yog siv rau kev nyeem ntawv, OutputStream rau kev sau ntawv. Lawv txuas nrog ua tus dai kom zoo nkauj rau ib leeg xws li koj tuaj yeem nyeem / sau txhua hom ntaub ntawv sib txawv los ntawm txhua hom kev sib txawv
Qhov txawv ntawm kwj thiab MemoryStream yog dab tsi?
Kwj yog ib tug sawv cev ntawm bytes. Ob chav kawm no muab tau los ntawm chav kawm kwj uas yog paub daws teeb los ntawm kev txhais. Raws li lub npe qhia, FileStream nyeem thiab sau rau hauv cov ntaub ntawv thaum MemoryStream nyeem thiab sau rau hauv lub cim xeeb. Yog li nws hais txog qhov twg cov kwj tau khaws cia
Dab tsi yog tus hais lus sau nws lub hom phiaj thiab dab tsi yog yam tseem ceeb uas yuav tsum nco ntsoov txog cov lus hais?
Cov neeg hais lus sau ntawv yog cov ntawv qhia uas tus neeg nthuav qhia siv thaum nthuav qhia qhov kev nthuav qhia. Lawv pab tus neeg nthuav qhia nco txog cov ntsiab lus tseem ceeb thaum muab kev nthuav qhia. Lawv tshwm sim ntawm tus swb thiab tuaj yeem pom tsuas yog los ntawm tus tshaj tawm thiab tsis yog cov neeg tuaj saib