Multiple Virtual Functions Called in Turn : virtual function « Class « C++

1. C++
2. Class
3. virtual function

Multiple Virtual Functions Called in Turn

  
#include <iostream>
using namespace std;

class Mammal
{
  public:
     Mammal():itsAge(1) {  }
     virtual ~Mammal() { }
     virtual void Speak() const { cout << "Mammal speak!\n"; }

  protected:
     int itsAge;
};

class Dog : public Mammal
{
  public:
    void Speak()const { cout << "Woof!\n"; }
};

class Cat : public Mammal
{
  public:
    void Speak()const { cout << "Meow!\n"; }
};


class Horse : public Mammal
{
  public:
    void Speak()const { cout << "Winnie!\n"; }
};

class Pig : public Mammal
{
  public:
    void Speak()const { cout << "Oink!\n"; }
};

int main()
{
   Mammal* theArray[5];
   Mammal* ptr;

   ptr = new Dog;
   theArray[0] = ptr;
   ptr = new Cat;
   theArray[1] = ptr;
   ptr = new Horse;
   theArray[2] = ptr;
   ptr = new Pig;
   theArray[3] = ptr;
   ptr = new Mammal;
   theArray[4] = ptr;
   
   for (int i=0;i<5;i++)
      theArray[i]->Speak();
   return 0;
}
  
    
  

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