Ib tus lej tuaj yeem muab sib npaug los ntawm 2 siv tus tswv lag luam me me. Qhov no yog ua los ntawm kev siv tus neeg tsav tsheb sab laug thiab hloov cov khoom seem ntawm 1. Qhov no ua rau ob npaug ntawm tus lej dhau los. Ib qho kev pab cuam uas qhia txog kev sib npaug ntawm tus lej los ntawm 2 siv cov neeg ua haujlwm bitwise yog muab raws li hauv qab no.
Yuav ua li cas koj muab nrog Bitwise?
Yuav muab ntau npaum li cas ntawm 2 rau lub zog ntawm N (i.e. 2^N) hloov cov khoom N sijhawm mus rau sab laug Txhawm rau faib cov khoom mus rau sab xis. Cov khoom yog tag nrho 1 lossis 0 - koj tsis tuaj yeem hloov los ntawm ib feem ntawm me ntsis yog li yog tus lej koj tau muab faib los ntawm tsis suav tag nrho tus nqi ntawm N ie.
Puas Bitwise ntau dua sai dua?
Bit-shifting tseem nrawm dua, tab sis rau tsis muaj zog-ntawm-ob-ob mul/div los ntawm lub sijhawm koj ua txhua yam koj hloov thiab ntxiv cov txiaj ntsig nws qeeb dua.
Yuav ua li cas sib npaug lossis faib nrawm dua?
Multiplication is nrawm dua faib. Hauv tsev kawm ntawv qib siab kuv tau qhia tias kev faib yuav siv rau lub sijhawm ntawm kev sib npaug. Lub sijhawm tiag tiag yog kev tsim qauv nyob ntawm tab sis feem ntau qhov sib npaug yuav tsis qeeb lossis qeeb li kev faib.
Puas yog Bitshifting sai dua qhov sib npaug?
Kev hloov pauv ntawm sab laug thiab sab xis yog pom meej nrawm dua li kev sib faib thiab faib ua haujlwmntawm feem ntau, tej zaum tag nrho, CPUs yog tias koj tshwm sim siv lub zog ntawm 2. Txawm li cas los xij, nws tuaj yeem txo qhov pom tseeb ntawm cov lej rau qee tus nyeem thiab qee qhov algorithms.
