how can I downcast proper class from vector?

Question

Dog is base object

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

and a lot of child class from dog

class Puppy : Dog {
    void bark(); (print : I am a purry)
}

class Puddle : Dog {
    void bark(); (print : I am a puddle)
}

put many kinds of child class into "Vector dogs"

Vector<Dog *> dogs;

dogs.pushBack(puppy);
dogs.pushBack(puddle);
dogs.pushBack(martiz);
dogs.pushBack(yok);

for (auto dog : dogs) {
    dog->bark();
}

all class print "I am a dog"

I want to downcast automatically their origin class.

what is the best way for my case?

What you want is not a downcast but `virtual void bark()` in `Dog`. — molbdnilo, May 08 '15 at 07:03
Note that you use private inheritance. You probably want to declare the derived classes as e.g. `class Puppy : public Dog`. — Frerich Raabe, May 08 '15 at 07:16

score 0 · Accepted Answer · answered May 08 '15 at 07:09

0

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

you should set the bark to a virtual void bark and it should work

answered May 08 '15 at 07:09

Druide

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how can I downcast proper class from vector?

1 Answers1