Video: Peb tuaj yeem txheeb cov vector?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Yog, koj muaj peev xwm txheeb a const vector hauv C++. Cia ib const vector yog v. Yog xav tau xaiv qhov no vector siv xaiv (v. pib(), v.
Nyob rau hauv kev hwm rau qhov no, ua li cas koj txheeb ib vector nyob rau hauv descending order?
Kom tau ib tug ruaj khov xaiv , mus nrog std::stable_sort uas siv cov kev sib koom ua ke. Ob-arg version ntawm std:: xaiv algorithm txheeb cov vector nyob rau hauv ascending kev txiav txim siv tus neeg teb xov tooj <. Kom tau txais cov nqis txiav txim , hu rau std:: thim rov qab qab std:: xaiv . Saum toj no code yuav tsum tau ib tug ntxiv pass rau thim rov qab tus vector.
Qhov thib ob, koj yuav txheeb cov kab vector hauv C ++ li cas? Koj yuav tsum siv std:: xaiv rau sorting hlua . Tshwj xeeb, cast std:: txoj hlua rau void * thiab ces mus rau char * yog undefined thiab yuav tsis ua hauj lwm. Yog tias koj xav thim rov qab qhov kev txiav txim ntawm kev txheeb xyuas tsuas yog hloov kho qhov kos npe hauv cmp muaj nuj nqi. Nov yog lwm qhov C++ txoj kev txheeb array ntawm txoj hlua tsis siv < vector >.
Ib yam li ntawd, yog vector txiav txim hauv C ++?
Tsis muaj vector yog los ntawm txhais tau tias yuav txheeb , yog li cov ntsiab lus yuav tsis yog "hauv xaj ". Ntxiv mus, tag nrho cov iterators thiab references rau cov ntsiab lus ntawm a vector yuav invalidated raws li insertion tsuas yog reallocation tshwm sim (piv txwv li thaum qhov luaj li cas ntawm lub vector tshaj nws lub peev xwm).
Koj txheeb tus vector li cas?
Kev txheeb a vector hauv C++ Sorting a vector hauv C ++ tuaj yeem ua tau los ntawm kev siv std:: xaiv (). Nws yog txhais nyob rau hauv header. Kom tau ib tug ruaj khov xaiv std::stable_sort yog siv. Nws yog raws nraim li xaiv () tab sis tswj hwm qhov kev sib raug zoo ntawm cov khoom sib npaug.
Pom zoo:
Cov lag luam feem ntau txhim kho dab tsi tuaj yeem khaws thiab txheeb xyuas cov ntaub ntawv rau lub hom phiaj ntawm kev txiav txim siab ua lag luam?
Cov lag luam feem ntau txhim kho dab tsi tuaj yeem khaws thiab txheeb xyuas cov ntaub ntawv rau lub hom phiaj ntawm kev txiav txim siab ua lag luam? kev khiav hauj lwm qhov system. Ib lub hom phiaj ntawm kev tswj cov ntaub ntawv yog muab cov lag luam nrog cov ntaub ntawv zoo uas lawv xav tau: ua kom tiav ib txoj haujlwm
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