Video: Kev siv Fstream hauv C ++ yog dab tsi?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
std:: fstream . Input/output kwj chav kawm ua haujlwm ntawm cov ntaub ntawv. Cov khoom ntawm cov chav kawm no tuav cov khoom filebuf raws li lawv cov kwj sab hauv, uas ua haujlwm tawm tswv yim / tso tawm ntawm cov ntaub ntawv uas lawv cuam tshuam nrog (yog tias muaj). Cov ntaub ntawv ntws yog txuam nrog cov ntaub ntawv ntawm kev tsim kho, lossis los ntawm kev hu rau cov tswv cuab qhib.
Yog li ntawd, vim li cas peb thiaj siv Fstream hauv C ++?
fstream yog lwm C++ txheem tsev qiv ntawv zoo li iostream thiab yog siv nyeem thiab sau rau ntawm cov ntaub ntawv. Nws yog siv tsim cov ntaub ntawv thiab sau rau ntawm cov ntaub ntawv. Nws yog siv nyeem los ntawm cov ntaub ntawv. Nws ua tau ua haujlwm ntawm ob qho tib si dej ntws thiab ifstream uas txhais tau tias ua tau tsim cov ntaub ntawv, sau rau ntawm cov ntaub ntawv, thiab nyeem los ntawm cov ntaub ntawv.
Tom qab ntawd, lo lus nug yog, koj siv Fstream li cas? Nyeem cov ntawv nyeem yog ib qho yooj yim heev uas siv ifstream (cov ntaub ntawv tawm tswv yim).
- suav nrog cov headers tsim nyog. # suav nrog siv namespace std;
- Tshaj tawm cov ntaub ntawv tawm tswv yim (ifstream) hloov pauv.
- Qhib cov ntaub ntawv ntws.
- Xyuas tias cov ntaub ntawv tau qhib.
- Nyeem los ntawm cov kwj deg tib yam li cin.
- Kaw cov dej nkag.
Kuj paub, Fstream ua haujlwm li cas hauv C ++?
C++ muab cov chav kawm hauv qab no los ua cov khoom tso tawm thiab kev nkag ntawm cov cim rau / los ntawm cov ntaub ntawv: dej ntws : kwj chav kawm los sau rau ntawm cov ntaub ntawv. ifstream: kwj chav kawm nyeem los ntawm cov ntaub ntawv. fstream : kwj chav kawm rau ob qho tib si nyeem thiab sau los ntawm / rau cov ntaub ntawv.
Dab tsi yog hom ntaub ntawv hauv C ++?
ntaub ntawv -stream-object("filename", hom ); ntaub ntawv -stream-object, yog tus ntawm a ntaub ntawv kwj chav kawm siv los ua ib qho tshwj xeeb ntaub ntawv kev ua haujlwm. filename, yog lub npe ntawm a ntaub ntawv ntawm qhov peb yuav ua ntaub ntawv kev ua haujlwm. hom , yog ib leeg lossis ntau yam hom ntaub ntawv uas peb tab tom yuav qhib ib ntaub ntawv.