Polymorphism
            Polymorphism means the ability to take more than one form.An operation may exhibit different behaviours in different instances.The behaviour depends upon the types of data used in the operation.

• C++ achieves polymorphism through the use of function overloading.
• Two or more functions can share the same name as long as their parameter declarations are different.
• In this situation, the functions that share the same name are said to be overloaded, and the process is referred to as function overloading.
• Function overloading, allows the user to create multiple definitions for functions.
• The programmer can have several functions with the same name, but with different argument lists or signatures.
• The function definition also changes with the change of signature.

Example

class Colour {

  public:

    virtual ~Colour(); 

  };

  class Red : public Colour {

  public:

    ~Red();      // Virtuality inherited from Colour

  };

  class LightRed : public Red {

  public:

    ~LightRed();

  };

void main(){

Colour *palette[3];

  palette[0] = new Red;   // Dynamically create a new Red object

  palette[1] = new LightRed;

  palette[2] = new Colour;

}