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Virtual functions

This thread contains 1 reply, has 2 voices, and was last updated by Nitesh User Do not delete 1 year, 2 months ago.

  • Author Replies
    • #52555

      What are virtual functions?


    • #52558

      A virtual function is a member function which is declared within the base class and is re-defined (Override) by the derived class. When you allude to a derived class object utilizing a pointer or a reference to the base class, you can call a virtual function for that object and execute the derived class’s version of the function.

      Following things are important to compose a C++ program with runtime polymorphism (utilization of virtual capacities)

      1) A base class and a derived class.
      2) A function with the same name in base class and derived class.
      3) A pointer or reference of base class type pointing or referring to an object of derived class.

      EXAMPLE: –

      #include<iostream>
      using namespace std;

      class Base {
      public:
      virtual void show() { cout<<” In Base \n”; }
      };

      class Derived: public Base {
      public:
      void show() { cout<<“In Derived \n”; }
      };

      int main(void) {
      Base *xy = new Derived;
      xy->show(); // RUN-TIME POLYMORPHISM
      return 0;
      }

      Output: In Derived


      Regards,
      Nitesh Bavishiya

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