如何遍历 shared_ptr 向量

Question

I have a vector:

vector<MyClass> database;  

and a second one:

vector<shared_ptr<MyClass> > databasePtrs;

databasePtrs contains pointers to database elements in a certain order. I want to iterate through the pointers using an iterator, not for cycle. But I have no idea how to create the iterator. The expression:

vector<MyClass>::iterator it;

obviously doesn't work, nor do other variants I've tried.

Answer 1

I have no idea, how to create the iterator.

You can get the iterator to the first element of the vector using std::vector::begin .

 vector<MyClass>::iterator it;

You cannot use that iterator to iterate a vector<shared_ptr<MyClass> > . You need a vector<shared_ptr<MyClass> >::iterator instead.