How to use D-language polymorphism?

Jean Cesar via Digitalmars-d-learn digitalmars-d-learn at puremagic.com
Thu Feb 16 11:09:20 PST 2017


I have the following code in c++ using polymorphism how would I 
convert D-language polymorphism?
#include <cstdlib>
#include <iostream>

class Mamifero
{
  protected:
    int idade;

  public:
    Mamifero(){}
    ~Mamifero(){}

    virtual void somMamifero() const
    {
      std::cout<<"\n\tSom de mamifero.\n";
   }
};

class Boi: public Mamifero
{
  public:
    void somMamifero() const
    {
     std::cout<<"\n\tMuu ..! Muu..!!\n";
    }
};

class Gato: public Mamifero
{
  public:
    void somMamifero() const
    {
     std::cout<<"\n\tMiAu ..! MiAu..!!\n";
    }
};

class Porco: public Mamifero
{
  public:
    void somMamifero() const
    {
     std::cout<<"\n\tOinc ..! Oinc..!!\n";
    }
};

class Cachorro: public Mamifero
{
  public:
    void somMamifero() const
    {
     std::cout<<"\n\tAu ..! Au..!!\n";
    }
};

int main()
{
   Mamifero* mamPtr;
   int op;
   while(op != 5)
   {
     std::cout<<"\n\t(1) Boi"
              <<"\n\t(2) Gato"
              <<"\n\t(3) Porco"
              <<"\n\t(4) Cachorro"
              <<"\n\t(5) Sair"
	     <<"\n\tDigite: ";
      std::cin>>op;
    switch(op)
     {
      case 1:{
        mamPtr = new Boi();
        mamPtr->somMamifero();
        break;
       }
      case 2:{
        mamPtr = new Gato();
        mamPtr->somMamifero();
        break;
       }
      case 3:{
        mamPtr = new Porco();
        mamPtr->somMamifero();
        break;
       }
      case 4:{
        mamPtr = new Cachorro();
        mamPtr->somMamifero();
        break;
       }
      case 5:{
        std::cout<<"\n\tGood Bye\n\n";
        exit(0);
        break;
       }
      default:
        std::cout<<"\n\tOpção Inválida ..!!!\n";
     }
   }
}


More information about the Digitalmars-d-learn mailing list