Video: Qhov txawv ntawm compilers thiab txhais lus yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Qhov txawv ntawm Compiler thiab Txhais Lus . A compiler yog tus neeg txhais lus uas hloov cov lus qhov chaw (lus siab) mus rau yam lus (machine language). Tsis sib xws nrog lub compiler , ib neeg txhais lus yog ib qho program uas ua raws li kev ua tiav ntawm cov program sau hauv a hom lus.
Ntxiv mus, dab tsi yog qhov txawv ntawm compiler thiab tus neeg txhais lus?
Cov qhov sib txawv loj yog tias ib neeg txhais lus ncaj qha executes cov lus qhia hauv qhov programminglanguage thaum a compiler txhais cov lus qhia mus rau hauv lub tshuab code. Ib neeg txhais lus feem ntau yuav tsim ib qho kev sawv cev nruab nrab zoo thiab ntsuas tam sim ntawd.
Ib yam li ntawd, vim li cas thiaj siv compilers thiab txhais lus? A compiler yog ib lub cuab yeej uas yog siv hloov cov ntawv ntawm cov lus programming (hu ua qhov chaws) rau hauv tshuab code. Lub tshuab code tuaj yeem raug tua ntawm themachine, yam tsis muaj tus lej tseem ceeb tam sim no. Ib neeg txhais lus yog ib lub cuab tam uas yuav siv lub hauv paus code ntawm aprogram thiab executes nws tam sim ntawd.
Ib sab saum toj no, qhov twg zoo dua compiler lossis txhais lus?
Qhov sib txawv hauv paus yog qhov a compiler system, nrog rau ib tug (built in los yog cais) linker, generates ib tug stand alonemachine code program, thaum ib tug neeg txhais lus system es tsis txhob ua tej yam uas tau piav los ntawm qhov kev pab cuam theem siab. 2) Thaum aprogram tau muab tso ua ke, nws qhov chaws tsis muaj txiaj ntsig rau kev khiav thecode.
Dab tsi yog qhov txiaj ntsig ntawm kev sib sau ua ke ntawm tus neeg txhais lus?
Compilers tuaj yeem tsim tau ntau npaum li cas objectcode ntau dua cov neeg txhais lus yog li ua cov kev pab cuam compiled torun sai. Cov neeg txhais lus txawm li cas los xij yog siv tau yooj yim dua, tshwj xeeb tshaj yog rau cov pib tshiab, vim tias qhov yuam kev tau tshwm sim tam sim ntawd, kho los ntawm tus neeg siv, kom txog rau thaum qhov kev pab cuam tuaj yeem ua tiav.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm lub thawv thiab lub thawv ntawv thiab lub thawv ntawv yog dab tsi?
Ib lub thawv thiab cov ntawv nplawm (qee zaum hu ua boxplot) yog ib daim duab uas nthuav tawm cov ntaub ntawv los ntawm tsib lub ntsiab lus. Nyob rau hauv ib lub thawv thiab whisker zajlus: qhov kawg ntawm lub thawv yog lub sab sauv thiab sab quartiles, yog li lub thawv spans lub interquartile ntau yam. qhov nruab nrab yog cim los ntawm ib txoj kab ntsug hauv lub thawv
Dab tsi yog qhov zoo sib xws thiab qhov txawv ntawm relays thiab PLC yog dab tsi?
Relays yog electro-mechanical keyboards uas muaj coil thiab ob hom kev sib cuag uas tsis yog NO & NC. Tab sis Programmable Logic Controller, PLC yog lub khoos phis tawj me uas tuaj yeem txiav txim siab raws li qhov kev zov me nyuam thiab nws cov tswv yim & tso tawm
Dab tsi yog qhov sib txawv tseem ceeb ntawm kev sib txuas lus tsis sib xws thiab kev sib txuas lus taw qhia?
1. Hauv kev sib txuas lus tsis muaj kev sib txuas lus tsis tas yuav tsim kev sib txuas ntawm qhov chaw (sender) thiab qhov chaw (receiver). Tab sis nyob rau hauv kev sib txuas-taw qhia kev sib txuas lus kev sib txuas lus yuav tsum tau tsim ua ntej hloov cov ntaub ntawv
Dab tsi yog qhov sib txawv ntawm qhov ntsuas qhov ntsuas thiab qhov ntsuas thib ob?
Primary index: nyob rau hauv ib tug sequentially order file, qhov Performance index uas nws search key qhia cov sequential order ntawm cov ntaub ntawv. Kuj hu ua clustering index. Secondary index: ib qho Performance index uas nws qhov tseem ceeb tshawb nrhiav qhia qhov kev txiav txim sib txawv ntawm qhov kev txiav txim ntawm cov ntaub ntawv. Kuj hu ua non-clustering index
Qhov txawv ntawm qhov chaw nyob sib txuas lus thiab qhov chaw nyob ruaj khov yog dab tsi?
Qhov chaw nyob xa ntawv yog chaw nyob sib txuas lus piv txwv li qhov koj nyob tam sim no. & chaw nyob Apermanent yog ntawm koj cov ntaub ntawv yog sau rau ntawm koj daim ntawv pov thawj hnub yug & daim npav pov npav. Qhov chaw nyob ruaj khov & kev sau ntawv yuav zoo ib yam lossis txawv ntawm cov ntaub ntawv siv tau