c++ - how can I downcast proper class from vector? -

dog base object

class dog {     void bark(); (print : dog) } 

and lot of child class dog

class puppy : dog {     void bark(); (print : purry) }  class puddle : dog {     void bark(); (print : puddle) } 

put many kinds of child class "vector dogs"

vector<dog *> dogs;  dogs.pushback(puppy); dogs.pushback(puddle); dogs.pushback(martiz); dogs.pushback(yok);  (auto dog : dogs) {     dog->bark(); } 

all class print "i dog"

i want downcast automatically origin class.

what best way case?

class dog {    virtual void bark(); (print : dog) } 

you should set bark virtual void bark , should work