Difference between Compile Time Polymorphism and Run Time Polymorphism ?

Question

What is the difference between Compile Time Polymorphism and Run Time Polymorphism ? Please give the suitable example.

Vulpes · Answer

Here's a simple example of what Amruta was describing: using System; class Parent { public virtual void Method(string s) { Console.WriteLine("Parent.Method called with an argument of {0}", s); } } class Child : Parent { public override void Method(string s) { Console.WriteLine("Child.Method called with an argument of {0}", s); } } class Test { static void Main() { Parent p = new Parent(); p.Method("Hello"); p = new Child(); string s = "Goodbye" + " for now"; // compile time polymorphism, string class overloads '+' operator p.Method(s); // run time polymorhism, Method is late bound to Child's version Console.ReadKey(); } }

Amruta Kirdat · Answer

Polymorphism is defined as one interface to control access to a general class of actions. There are two types of polymorphism one is compile time polymorphism and the other is run time polymorphism. Compile time polymorphism is functions and operators overloading. Runtime time polymorphism is done using inheritance and virtual functions. Run time polymorphism means later binding,function overriding concepts are involved in this polymorphism. compile time poly means early binding ,fn overloading concepts