I need some examples with vectors on c++.

Answer 1

Sure,

Ability - vectors

https://code.sololearn.com/cMMcFCTL93kQ/?ref=app

Answer 2

?

https://www.sololearn.com/learn/261/?ref=app

Answer 3

https://code.sololearn.com/cx5t4kFdf4pW/?ref=app
https://code.sololearn.com/cU2KHvrLZQvl/?ref=app