Dab tsi yog random access file hauv C ++?

2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47

Random File Access hauv C

Hauv cov tshooj dhau los, peb kawm yuav ua li cas qhib a ntaub ntawv ,kaw a ntaub ntawv , nyeem los ntawm a ntaub ntawv thiab sau rau a ntaub ntawv . Peb kuj kawm tau tias muaj ob hom cov ntaub ntawv , binary cov ntaub ntawv thiab ntawv cov ntaub ntawv . Random ntaub ntawv nkag txhais tau tias koj tuaj yeem nqa tau ntaub ntawv taw tes rau ib feem ntawm qhov ntaub ntawv rau kev nyeem ntawv lossis sau ntawv.

Tsuas yog li ntawd, dab tsi yog random nkag cov ntaub ntawv hauv C ++?

C++ txhawb nqa random - nkag mus rau cov ntaub ntawv nrog ntau lub luag haujlwm. Cov haujlwm no suav nrog kev txheeb xyuas qhov yuam kev, ntaub ntawv pointer positioning, thiab qhib thiab kaw ntawm cov ntaub ntawv.

Ib sab saum toj no, qhov sib txawv ntawm cov ntaub ntawv nkag mus txuas ntxiv thiab cov ntaub ntawv nkag mus tsis tau yog dab tsi? Sequential Access rau ib data ntaub ntawv txhais tau hais tias lub computer system nyeem los yog sau cov ntaub ntawv rau lub cov ntaub ntawv ua ntu zus , pib txij thaum pib ntawm lub ntaub ntawv thiab ua ib kauj ruam zuj zus. Ntawm qhov tod tes, Random Access rau a ntaub ntawv txhais tau hais tias lub computer system tuaj yeem ua tau nyeem los yog sau cov ntaub ntawv nyob qhov twg hauv cov ntaub ntawv ntaub ntawv.

Tsis tas li ntawd, dab tsi yog random access file?

Random - nkag mus rau cov ntaub ntawv yog ib lo lus siv los piav txog a ntaub ntawv los yog set ntawm cov ntaub ntawv uas nkag mus ncaj qha es tsis txhob xav kom lwm tus cov ntaub ntawv nyeem ua ntej. Khoos phis tawj hard drives nkag mus rau cov ntaub ntawv ncaj qha, qhov twg daim kab xev drives feem ntau nkag mus rau cov ntaub ntawv ua ntu zus. Ncaj nraim nkag mus , Hardware Terms, Sequential ntaub ntawv.

Lub luag haujlwm twg tso cai rau nkag mus rau hauv hom random?

Random nkag database muaj nuj nqi tso cai mus rau nkag mus rau ib cov ntaub ntawv nyob rau hauv tsis sequential los yog random hom . Nrog random nkag rau cov ntaub ntawv , peb tuaj yeem nyeem lossis sau tag nrho cov ntaub ntawv hauv peb lub hard drive ntaub ntawv tsis tas yuav nyeem lossis sau cov ntaub ntawv saum toj no. Peb tuaj yeem nrhiav sai sai, hloov pauv, thiab tshem tawm cov ntaub ntawv hauv txhua qhov siv tau ntaub ntawv.