Virtual functions accessed from pointer - C++ Class

C++ examples for Class:Virtual Function

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Description

Virtual functions accessed from pointer

Demo Code

#include <iostream>
using namespace std;
class Base/*from  ww  w. ja  v a  2  s .com*/
{
   public:
   virtual void show()         //virtual function
   { cout << "Base\n"; }
};
class Derv1 : public Base         //derived class 1
{
   public:
   void show()
   { cout << "Derv1\n"; }
};
class Derv2 : public Base         //derived class 2
{
   public:
   void show()
   { cout << "Derv2\n"; }
};
int main()
{
   Derv1 dv1;           //object of derived class 1
   Derv2 dv2;           //object of derived class 2
   Base* ptr;           //pointer to base class
   ptr = &dv1;          //put address of dv1 in pointer
   ptr->show();         //execute show()
   ptr = &dv2;          //put address of dv2 in pointer
   ptr->show();         //execute show()
   return 0;
}

Result


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