Polymorphism
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This document discusses polymorphism in programming. It defines polymorphism as the ability for a message or data to be processed in multiple forms. There are two main types: static polymorphism (also called compile-time polymorphism), which uses method overloading and is resolved at compile time, and dynamic polymorphism (also called runtime polymorphism), which uses method overriding and is resolved at runtime. The document provides examples of each type, including method overloading in a calculation class and method overriding in shape and circle classes. Polymorphism in C# can be achieved through function overloading, operator overloading, dynamic binding, and using virtual functions.
Polymorphism
- 1. Present by: Arif Ayoub Ansari
- 2. POLYMORPHISM:- IT IS DERIVED FROM THE GREEK WORD POLUMORPHOUS POLUS-MANY MORPHE-SHAPE/FORM “HAVING MULTIPLE FORM”
- 3. It is the ability for a message or data to be processed in more than one form. It is the property by which the same message can be sent to objects of several different classes.
- 4. Example The message send by ringing the bell in school, is processed in many forms by which we are informed about:- The beginning of the class, End of the class, Beginning of an interval, End of the day’s classes etc.
- 6. STATIC POLYMORPHISM Static polymorphism is also called as Compile Time polymorphism. In Static polymorphism methods are overloaded with same name but having different signatures. So it is called as method overloading.
- 7. Static or Compile Time Polymorphism:- In static polymorphism, the decision is made at compile time. Which method is to be called is decided at compile-time only. Method overloading is an example of this. Compile time polymorphism is method overloading, where the compiler knows which overloaded method it is going to call.
- 8. Example: - public class clsCalculation { public int Add(int a, int b) { return a + b; } public double Add(int z, int x, int c) { return z + x + c; } }
- 9. DYNAMIC POLYMORPHISM Dynamic polymorphism is also called as Run Time polymorphism. In this type of polymorphism methods have the same name, same signature but different in the implementation. In Dynamic polymorphism methods are overridden so it also called as method overriding.
- 10. Dynamic or Runtime Polymorphism: Method overriding allows us to have methods in the base and derived classes with the same name and the same parameters. By runtime polymorphism, we can point to any derived class from the object of the base class at runtime that shows the ability of runtime binding.
- 11. Example:- public class clsShape { public int _radius = 5; public virtual double getArea() { return 0; } } public class clsCircle : clsShape { public override double getArea() { return 3.14 * _radius * _radius; } } public class clsSphere : clsShape { public override double getArea() { return 4 * 3.14 * _radius * _radius; } }
- 12. Polymorphism in c# is achieved by:- Function Overloading Operator Overloading Dynamic Binding
- 13. EARLY BINDING It refers to the ability of the compiler to relate or bind a function definition during compilation itself. FUNTION OVERLOADING and OPERATER OVERLOADING comes under this category.
- 14. LATE BINDING It refers to the binding of a function call with the function definition during Run-time. It uses the concept of POINTERS and INHERITENCE.
- 15. Achieving Polymorphism POLYMORPHISM COMPILE TIME / STATIC / EARLY BINDING FUNCTION OVERLOADING OPERATOR OVERLOADING RUNTIME / DYNAMIC / LATE BINDING VIRTUAL FUNCTION
- 16. THANK YOU