Does polymorphism only work with pointers C++?

Does polymorphism work in C++ without pointers / references? Yes and no. Dynamic polymorphism works in C++ when the static type of a pointer or reference might be different to the dynamic type of the object it refers to, and behaviour is chosen based on the dynamic type.

Why do we use pointer in polymorphism?

Pointers to base class Polymorphism is the art of taking advantage of this simple but powerful and versatile feature. That is why the program above accesses the area members of both objects using rect and trgl directly, instead of the pointers; the pointers to the base class cannot access the area members.

Can I use C++ without pointers?

Originally Answered: Is it possible to program in C++ without never using pointers? Yes, but such a program would be using the computer’s memory inefficiently. Also, without pointers, heap memory cannot be accessed. , 20+ years developing applications in a variety of languages.

Can we implement polymorphism in C?

There are many tricky ways for implementing polymorphism in C. By creating a VTable (virtual Table) and providing proper access between base and derived objects, we can achieve inheritance and polymorphism in C. The concept of VTable can be implemented by maintaining a table of pointers to functions.

Can we create pointer to abstract class?

Abstract class cannot be instantiated, but pointers and refrences of Abstract class type can be created.

What are the important conditions for implementing polymorphism C++?

Typically, polymorphism occurs when there is a hierarchy of classes and they are related by inheritance. C++ polymorphism means that a call to a member function will cause a different function to be executed depending on the type of object that invokes the function.

Is new in C++ bad?

Generally, new is not such bad practice, and it’s not a bad idea. The answer you linked recommends removing the new() s to address a compile-time error: You can’t pass a pointer to a function that doesn’t expect one! If you did away with “raw pointer” in C++ you wouldn’t have much left.

How does C++ support polymorphism?

Polymorphism in C++ C++ polymorphism means that a call to a member function will cause a different function to be executed depending on the type of object that invokes the function. You have different classes with a function of the same name, and even the same parameters, but with different implementations.

Which one Cannot create object?

Because an abstract class is an incomplete class (incomplete in the sense it contains abstract methods without body and output) we cannot create an instance or object; the same way you say for an interface.

Can abstract class have implementation Java?

An abstract class can have an abstract method without body and it can have methods with implementation also. abstract keyword is used to create a abstract class and method. Abstract class in java can’t be instantiated.

Why doesn’t polymorphism work if there is no base class pointer?

If you don’t have a base class pointer or reference to a derived class, polymorphism doesn’t work because you no longer have a derived class. Take The c object isn’t a Derived, but a Base, because of slicing.

Does polymorphism still work?

So, technically, polymorphism still works, it’s just that you no longer have a Derived object to talk about. c just points to some place in memory, and you don’t really care whether that’s actually a Base or a Derived, but the call to a virtual method will be resolved dynamically.

Are references and pointers non-polymorphic?

It did not have to be this way, either: references and pointers could have been defined as being non-polymorphic (disallowing them to reference or point to subtypes of their declared types) and forcing the programmer to come up with alternative ways of implementing polymorphism.

What is polymorphism in C++ and how does it work?

So in lieu of the above, polymorphism in C++ is accomplished by allowing references and pointers to objects to reference and point to objects of their declared compile-time types and any subtypes thereof.