Forward, bidirectional e random access iterators

• Forward iterator

  • avanço: ++ (forma pré-fixa e pós-fixa)

• Bidirectional iterator

  • engloba forward iterator
  • retrocesso: -- (forma pré-fixa e pós-fixa)

• Random access iterator

  • engloba bidirectional iterator
  • +, - , +=, -=, <, >, <=, >=