Tus neeg teb xov tooj twg siv los faib cov khoom dynamically ntawm chav kawm hauv C ++?

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

C++ txhawb nqa dynamic allocation thiab deallocation ntawm khoom siv tus tshiab thiab rho tawm cov neeg ua haujlwm . Cov no cov neeg ua haujlwm faib nco rau khoom los ntawm lub pas dej ua ke hu ua lub khw dawb. Qhov tshiab tus neeg ua haujlwm hu rau qhov tshwj xeeb muaj nuj nqi tus neeg ua haujlwm tshiab, thiab rho tawm tus neeg ua haujlwm hu rau qhov tshwj xeeb muaj nuj nqi tus neeg ua haujlwm rho tawm.

Ua li no, koj yuav ua li cas dynamically faib cov array ntawm cov khoom hauv C ++?

C ++ Lus Cim: Dynamic Allocation of Arrays

1. Cov teeb meem nrog taag loj arrays. Tshaj tawm ib qho array nrog qhov loj me xws li.
2. Tshaj tawm array ua tus pointer, faib nrog tshiab. Txhawm rau tsim ib qho kev sib txawv uas yuav taw tes rau qhov dynamically faib array, tshaj tawm nws ua tus taw tes rau lub caij.
3. Allocate ib array nrog code> tshiab.
4. Tso lub cim xeeb nrog rho tawm.
5. Piv txwv.

Tsis tas li ntawd, ua li cas koj faib thiab faib lub cim xeeb dynamically hauv C ++? C siv malloc() thiab calloc() ua haujlwm rau faib lub cim xeeb dynamically thaum lub sij hawm khiav thiab siv free() muaj nuj nqi kom dawb dynamically faib nco . C++ txhawb cov haujlwm no thiab tseem muaj ob tus neeg ua haujlwm tshiab thiab tshem tawm uas ua haujlwm ntawm faib thiab freeing lub nco nyob rau hauv txoj kev zoo dua thiab yooj yim dua.

Ib yam li ib tug yuav nug, koj yuav ua li cas thiaj li ua C ++ chav kawm uas nws cov khoom tsuas tuaj yeem faib tau dynamically?

1. Ua tsis tau. Qhov tsuas yog qhov koj tuaj yeem ua tau yog Ua tus tsim tus kheej ntiag tug, thiab muaj lub Hoobkas zoo li qub uas tsim ib qho piv txwv tshiab ntawm chav kawm. -
2. Tsim cov chav kawm zoo li no yeej muaj teeb meem.
3. Qhov ntawd yog qhov yuav tsum tau khib heev.

Kuv yuav txwv tsis pub muaj kev faib tawm ntawm ib qho khoom hauv C ++ li cas?

Pawg raws li khoom yog implicitly tswj los ntawm C++ compiler. Lawv raug puas tsuaj thaum lawv tawm mus thiab dynamically faib khoom yuav tsum tau manually tso tawm, siv tus neeg teb xov tooj rho tawm lwm yam nco leak tshwm sim. C++ tsis txhawb kev sau cov khib nyiab tsis siv neeg siv los ntawm cov lus xws li Java & C#.