With these classes:
class SerVivo {
public:
virtual void funcA() = 0;
virtual void funcB() = 0;
};
class Vegetal : public SerVivo{
public:
virtual void funcB(){ cout << "funcB em Vegetal \n"; }
virtual void funcC() = 0;
};
I wanted to know how I build the Tree class, derived from Vegetable, in order to build Tree-like objects.
You need to implement all the purely functions (defined as " virtual nome_da_duncao(...) = 0 ") of the hierarchy. Since Arvore is descendent of Vegetal , it must implement funcC . But since Vegetal is descendent of SerVivo , it also needs to implement funcA . You do not have to implement funcB because this has already been implemented in Vegetal.
Example:
class Arvore : public Vegetal {
public:
void funcA() { cout << "funcA em Arvore \n"; }
void funcC() { cout << "funcC em Arvore \n"; }
};
int main()
{
Arvore arvore1{};
arvore1.funcA();
arvore1.funcB();
arvore1.funcC();
return 0;
}
Output:
funcA em Arvore
funcB em Vegetal
funcC em Arvore
...Program finished with exit code 0