Video: Dab tsi yog qhov qub txeeg qub teg Dab tsi yog qhov sib txawv ntawm qhov qub txeeg qub teg piav nrog piv txwv?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Inheritance yog ib txoj hauv kev kom tau txais cov yam ntxwv thiab kev coj cwj pwm ntawm ib chav kawm los ntawm lwm chav kawm. Cov chav kawm uas cov tswv cuab tau txais qub txeeg qub teg yog hu ua chav kawm hauv paus , thiab chav kawm uas tau txais cov tswv cuab no yog hu ua muab cov chav kawm . Inheritance siv IS-A kev sib raug zoo.
Li no, dab tsi yog qhov qub txeeg qub teg Dab tsi yog hom qub txeeg qub teg?
Hom Kev Txhaum Cai hauv C++ Multiple Keeb kwm . Hierarchical Keeb kwm . Multilevel Keeb kwm . Hybrid Keeb kwm (tseem hu ua Virtual Keeb kwm )
Tsis tas li ntawd, qhov sib txawv ntawm cov qub txeeg qub teg hauv C ++ yog dab tsi? C ++ txhawb rau 6 hom kev qub txeeg qub teg raws li hauv qab no:
- Ib qho cuab yeej cuab tam.
- Multilevel Inheritance.
- Ntau yam cuab yeej cuab tam.
- Heirarchical Inheritance.
- Hybrid Inheritance.
- Multipath Inheritance.
Ntxiv mus, dab tsi yog qhov qub txeeg qub teg txhais tau tias nws?
Nyob rau hauv object-oriented programming, qub txeeg qub teg yog lub tswvyim hais tias thaum ib chav kawm ntawm cov khoom yog txhais , tej subclass uas yog txhais ua tau qub txeeg qub teg cov lus txhais ntawm ib lossis ntau chav kawm.
Koj txhais li cas los ntawm kev qub txeeg qub teg?
Keeb kwm yog ib tug mechanism nyob rau hauv ib chav kawm tshiab yog muab los ntawm ib chav kawm uas twb muaj lawm. Hauv Java, cov chav kawm tuaj yeem qub txeeg qub teg los yog tau txais cov khoom thiab cov txheej txheem ntawm lwm cov chav kawm. Ib chav kawm muab los ntawm lwm chav kawm yog hu ua subclass, whereas chav kawm los ntawm subclass tau muab los yog hu ua superclass.
Pom zoo:
Dab tsi yog qhov sib txawv ntawm qhov qub txeeg qub teg vs classical qub txeeg qub teg?
Yog li ntawd, tus qauv yog ib tug generalization. Qhov sib txawv ntawm cov qub txeeg qub teg thiab cov qub txeeg qub teg yog qhov qub txeeg qub teg qub qub yog txwv rau cov chav kawm qub txeeg qub teg los ntawm lwm cov chav kawm thaum cov khoom qub txeeg qub teg txhawb nqa cloning ntawm txhua yam khoom siv cov khoom sib txuas
Dab tsi yog hybrid qub txeeg qub teg nrog piv txwv?
Hybrid qub txeeg qub teg, tseem hu ua multipathinheritance, yog tus txheej txheem ntawm muab ib chav kawm uas siv ntau tshaj ib theem lossis ntau tshaj ib hom kev qub txeeg qub teg. Piv txwv li, ib chav kawm 'cov cim' yog muab los ntawm chav kawm 'stu' bysingle qib qub txeeg qub teg
Dab tsi yog qhov sib txawv ntawm qhov sib xyaw ua ke thiab qhov qub txeeg qub teg?
Txawm hais tias ob qho tib si Inheritance thiab Composition muab code reusablelility, qhov sib txawv tseem ceeb ntawm Composition thiab Inheritance nyob rau hauv Java yog tias Composition tso cai rov qab siv code yam tsis tau ncua nws tab sis rau Inheritance koj yuav tsum ncua chav kawm rau ib qho kev rov qab siv code lossis functionality
Vim li cas Ntau qhov qub txeeg qub teg tsis txaus siab hauv Java piav qhia nrog piv txwv?
Hauv java qhov no tsis tuaj yeem tshwm sim vim tsis muaj ntau yam qub txeeg qub teg. Ntawm no txawm tias ob lub interfaces yuav muaj tib txoj kev, cov chav kawm siv yuav tsuas muaj ib txoj hauv kev thiab qhov ntawd yuav ua tiav los ntawm tus neeg siv. Dynamic loading ntawm cov chav kawm ua rau kev siv ntau yam qub txeeg qub teg nyuaj
Dab tsi yog ntau yam qub txeeg qub teg piav nrog piv txwv?
Multiple Inheritance yog qhov tshwj xeeb ntawm C ++ qhov twg aclass tuaj yeem tau txais los ntawm ntau dua ib chav kawm. Theconstructors of inherited classes yog hu ua tib yam nyob rau hauv uas lawv tau txais qub txeeg qub teg. Piv txwv li, nyob rau hauv cov kev pab cuam hauv qab no, B's constructor hu ua ua ntej A'sconstructor