Dab tsi yog siv qhov system hauv C #?
Dab tsi yog siv qhov system hauv C #?

Video: Dab tsi yog siv qhov system hauv C #?

Video: Dab tsi yog siv qhov system hauv C #?
Video: Tus Tseem Poj Laib Ces Yog Kuv | Npauj Nyiag Yaj | Ma Ya | Official MV 2023 2024, Kaum ib hlis
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qhov system () yog siv los hais txog kev ua haujlwm qhov system lus command a C /C++ program. int qhov system (const char * lus txib); Siv qhov system (), peb tuaj yeem ua txhua yam lus txib uas tuaj yeem khiav ntawm lub davhlau ya nyob twg yog tias ua haujlwm qhov system tso cai. Piv txwv li, peb tuaj yeem hu tau qhov system ("dir") ntawm Windows thiab qhov system ("ls") los sau cov ntsiab lus ntawm cov npe.

Tom qab ntawd, ib tus tuaj yeem nug, qhov system ua li cas hauv C?

Hauv C Programming Language, cov qhov system function tso cai rau ib C program los khiav lwm qhov kev pab cuam los ntawm kev hla kab hais kom ua (qhia los ntawm txoj hlua) rau kev khiav hauj lwm qhov system command processor uas yuav ces raug tua.

Tsis tas li ntawd, System Library hauv C yog dab tsi? A tsev qiv ntawv hauv C yog ib phau ntawm cov ntaub ntawv header, nthuav tawm rau kev siv los ntawm lwm cov kev pab cuam. Cov tsev qiv ntawv yog li ntawd muaj ib tug interface qhia nyob rau hauv ib tug. h cov ntaub ntawv (lub npe hu ua "header") thiab ib qho kev siv tau qhia hauv. c ntaub ntawv. Format a tsev qiv ntawv nws txawv nrog kev ua haujlwm qhov system thiab compiler ib tug yog siv.

Kuj kom paub, System Command hauv Linux yog dab tsi?

qhov system () executes a lus txib teev nyob rau hauv lus txib los ntawm kev hu /bin/sh -c lus txib , thiab rov qab los tom qab lub lus txib tau ua tiav. Thaum lub sij hawm execution lus txib , SIGCHLD yuav raug thaiv, thiab SIGINT thiab SIGQUIT yuav raug tsis quav ntsej.

Vim li cas peb thiaj siv qhov system ncua hauv C ++?

Hauv cov ntsiab lus, nws muaj nres cov kev pab cuam execution thiab ua a qhov system hu thiab faib cov peev txheej tsis tsim nyog thaum koj yuav yog siv tej yam yooj yim li cin. tau (). Cov neeg siv System (" PAUSE ") vim lawv xav kom qhov kev zov me nyuam tos kom txog thaum lawv ntaus nkag mus rau lawv tuaj yeem pom lawv cov zis.

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