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Virtual functions
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What is: Abstract base class, and Pure Virtual function - C++

Posted 11-21-2011 at 04:42 AM by Anisha Kaul
Updated 01-10-2012 at 08:17 AM by Anisha Kaul
  • In the cases where the derived classes may share the common functionality
    but with altogether "different" definitions, it makes sense to force the
    developers to create their own definitions for those common functions in
    concerned derived classes.
    This can be achieved by making the class "abstract".
  • A class is called an "abstract" class when it contains at least one "pure
    virtual    " function.
  • A "pure virtual
...
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Old

What is: Upcasting, Early binding, Late binding, and Virtual function - C++

Posted 09-26-2011 at 03:52 AM by Anisha Kaul
Updated 01-10-2012 at 08:17 AM by Anisha Kaul
Consider the following example:
Assumption: File name is 1.cpp.
Code:
#include <iostream>
using namespace std;

class instrument
{
    public:
	void playInstrument ()
	{
	    cout << "\nInstrument::play" << "\n";
	}
};

class flute : public instrument 
{
    public:
	void playInstrument ()
	{
	    cout << "\nflute
...
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