What is polymorphic container?

What is polymorphic container?

The polymorphic STL container does not make any assumption about the base class. It uses the operator= of the smart pointer template class only. Therefore, the copy policy is defined by the smart pointer class you choose to use. So it should work with your smart pointers.

How do you store objects of different classes in the same vector?

The classes would need to have a common base class, e.g.: class MyBase { }; class Sphere : public MyBase { }; class Plane : public MyBase { }; Then in order to store polymorphic objects in a vector, you must store a pointer to them (because they can be different sizes from the base class).

Can vector store objects?

Vector Storage Mechanism. 2.2 When it comes to the storage of items, the STL vector employs “copy semantics”. 2.3 This means that when an object is added to it (e.g. via the push_back() method), a copy of the object (to be added) is created and then stored in the vector.

What is container and its types in C++?

The C++ container library categorizes containers into four types: Sequence containers. Sequence container adapters. Associative containers. Unordered associative containers.

Can you have a vector of classes?

Storing and Accessing Class Objects in a Vector The primary difference in using vectors for storing class objects versus using an array, other than all the differences between vectors and arrays, is how you declare the vector to store class objects. We can use the same Student class definition as shown earlier.

What is container classes explain with example?

A container class is a class that can hold a collection of items. Container classes can be implemented with a C++ class. The class is implemented with a header file (containing documentation and the class definition) and an implementation file (containing the implementations of the member functions).

What are the 5 types of inheritance in C++?

C++ supports five types of inheritance:

• Single inheritance.
• Multiple inheritance.
• Hierarchical inheritance.
• Multilevel inheritance.
• Hybrid inheritance.

Why do we need polymorphism?

Polymorphism is considered one of the important features of Object-Oriented Programming. Polymorphism allows us to perform a single action in different ways. In other words, polymorphism allows you to define one interface and have multiple implementations.