standard library STL in c++

Question

Can someone explain the below code?

vector<int> *vpoint =  new vector();

from what little i know, vector vpoint creates a vecor of type int, vpoint being its name. Then why do we need the above type of code?

And do we use the arrow operator -> with the the former code and use the dot operator with the latter code. Am i right. can someone explain in detail.

Is this something got to do with pointers?

Any help is appreciated. Thanks

Answer 1

First of all, you'r original code will not compile. However, answering your question, code (with fixed compilation error):

vector<int>* vpoint = new vector<int>;

Simply creates an object of std::vector class on the heap, and assigns an address of this object to vpoint variable.