C++ iterator for vector traversal, possible issue

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C++

vector

Hi all!

So I have another problem.

I have to traverse the vector and print out the values using an iterator.

I know you say.... how hard can that be?

I thought the same so i did like this

// suppose we have a vector that takes a pointer to an object of abstract class

// like this

std::vector<foo*> myVector(5); // declared a vector

// a print method just prints data of each object in the vector

for(int a = 0; a < myVector.size()-1; a++){
   myVector.at(a)->print();
}

// this works but using an iterator doesnt. Why?

// suppose we have this traversal

for(std::vector<foo*>::iterator a = myVector.begin(); i != myVector.end(); ++a){
 // trying to print out each object

  cout << *a << endl;

// of course it won't work why? first can't even get to print function

// second trying to access the object of an abstract class by derefencing the pointer.

// Oh and this, by dereferencing i cout the address of it but can't print out with print function
}

Ok i hope i didn't make any careless mistakes.

Please check my code and tell me whether i'm doing anything wrong.

As far as i know i can't dereference a pointer to abstract class since that would leave me with an object but this object doesn't exsist.

Is it possible to do it with iterator?

Thanks in advance!

What I have tried:

Tried the way it is written in the body of the problem.