Problem with vector of objects/pointers (Implementing composite design pattern)

Answer 1

you shoud use mem_fun() instead of mem_fun_ref(), it will work with pointers.

Answer 2

When you say:

void TextBody::addComponent(DocumentComponent& comp)
{
    container.push_back(&comp);
}

is the thing referred to dynamically allocated? If not, you will probably have problems, and if it is you should simply pass a pointer.

Answer 3

mem_fun_ref() calls a member on a reference object, mem_fun() calls a method through a pointer.

Therefore you will need to use mem_fun() like so:
textbody.cpp

void TextBody::print()
{
    if (container.size() == 0)
        return;
    for_each(container.begin(), container.end(),mem_fun(&DocumentComponent::print));
}

Answer 4

Thanks for the help guys, I ended up using a for loop but changed it back to the for_each with mem_fun instead of mem_fun_ref after seeing your answers, works like a charm