Initializing string from a vector

Hello, I am learning about ways of initializing strings from other containers. One of the tasks is to initialize a string from a char vector, but something goes wrong, and the book doesnt show an example on how to the initialization with another container besides an array.

Code:

---

vector<char> cvec = { 'H', 'i' };
    string s1(cvec, 2);

---

I think it should look something like this.
I have tried to write it 3-4 different ways, but nothing has worked.

If anyone could show me the correct syntax, I would be very grateful! :)

std::string s1(cvec.begin(), cvec.end()); // Iterator version
// Or
std::string s1(&cvec[0], cvec.size()); // C-style string + size version

Thank you! :) I think it was the second one the book was asking for