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What is polymorphism?
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What is polymorphism?
5,578 Views | (7 votes, avg: 3.86)
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‘Polymorphism’ is an object oriented term. Polymorphism may be defined as the ability of related objects to respond to the same message with different, but appropriate actions. In other words, polymorphism means taking more than one form.
Polymorphism leads to two important aspects in Object Oriented terminology - Function Overloading and Function Overriding.
Overloading is the practice of supplying more than one definition for a given function name in the same scope. The compiler is left to pick the appropriate version of the function or operator based on the arguments with which it is called.
Overriding refers to the modifications made in the sub class to the inherited methods from the base class to change their behaviour.
I thought Polymorphism is what happened to the “Teenage Mutant Ninja Turtles” when they can in contact with that ooze. Really!
It’s availible at your nearest video store.
Polymorphism can be achieved by the following:
Operator Overloading
Function Overloading
Function Overridding
Everyone here has forget about virtual functions. The most important aspect of C++ is that the polymorphism can be achieved by virtual functions.
Polymorphisam is having many forms.
- a particular construct can be executed in different ways.
Polymorphism is one of the main pillars of object oriented programming. It is concept to allow method invocation to be performed always on the most derived object. It is essentially associated with virtually function and late binding idea.
Polymorphism is Basically Using the same external interface for different internal structures.
That means Polymorphism can take more than one form.
Polymorphism lets u use same functions & operators in differnt way .
ex: Operator Overloading(Static)
Function Overloading(Static)
Virtual Functions(Dynamic)
Polymorphism allows objects to have both a static and a dynamic type. The static type is the pointer type; the dynamic type is what it points to. Virtual functions are dispatched based on dynamic type, so a base class pointer can point to a derived object and, using the vtable, call the derived class’ virtual function:
class Base {
…
virtual DoSomething() {…}
};
class Derived : public Base {
…
virtual DoSomething() {…}
};
Base *b = new Derived; // static type Base, dynamic type Derived
b->DoSomething(); // calls virtual Derived::DoSomething()
Polymorphism is the result of mixing C with C++
A side effect of this condition is brain-melt, something generic to Embedded programmers
Don’t forget default arguments in addition to function and operator overloading (static polymorphism) and overriding via virtual functions (dynamic).
A code is better than thousand words. An excellent example is,
>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>
#include
using namespace std;
class CPolygon {
protected:
int width, height;
public:
void set_values (int a, int b)
{ width=a; height=b; }
virtual int area ()
{ return (0); }
};
class CRectangle: public CPolygon {
public:
int area ()
{ return (width * height); }
};
class CTriangle: public CPolygon {
public:
int area ()
{ return (width * height / 2); }
};
int main () {
CRectangle rect;
CTriangle trgl;
CPolygon poly;
CPolygon * ppoly1 = ▭
CPolygon * ppoly2 = &trgl;
CPolygon * ppoly3 = &poly;
ppoly1->set_values (4,5);
ppoly2->set_values (4,5);
ppoly3->set_values (4,5);
cout area() area() area()
Polymorphism is another object oriented term . polymorphism is ability to take more than one meaning or more thhan one form…
Two types of polymorphism includes:
1. Dyamic polymorphism:
2. Static polymorphism:
In dynamic polymorphism includes a Method overriding and Virtual Method
In Static polymorphism includes a Method overloadng and operator overloading
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