What is base class initializer?

If you do not explicitly initialize a base class or member that has constructors by calling a constructor, the compiler automatically initializes the base class or member with a default constructor.

What is an initializer list in C++?

The initializer list is used to directly initialize data members of a class. The list begins with a colon ( : ) and is followed by the list of variables that are to be initialized – all of​ the variables are separated by a comma with their values in curly brackets.

Which constructor with initialise the base class data member?

Discussion Forum

Does base class constructor get called?

Base class constructors are always called in the derived class constructors. Whenever you create derived class object, first the base class default constructor is executed and then the derived class’s constructor finishes execution.

What does derived class does not inherit from the base class?

When you define a class to derive from another class, the derived class implicitly gains all the members of the base class, except for its constructors and finalizers. These members include a constructor, because constructors aren’t inherited.

What is a member initializer list?

Member initializer list is the place where non-default initialization of these objects can be specified. For bases and non-static data members that cannot be default-initialized, such as members of reference and const-qualified types, member initializers must be specified.

What is the advantage of initializer list in C++?

Initializer List is used in initializing the data members of a class. The list of members to be initialized is indicated with constructor as a comma-separated list followed by a colon. Following is an example that uses the initializer list to initialize x and y of Point class.

Is base a class?

A base class is also called parent class or superclass. Derived Class: A class that is created from an existing class. The derived class inherits all members and member functions of a base class. The derived class can have more functionality with respect to the Base class and can easily access the Base class.

Which constructor will be called first?

Why is base constructor called first?

The data members and member functions of base class comes automatically in derived class based on the access specifier but the definition of these members exists in base class only. This is why the constructor of base class is called first to initialize all the inherited members.

What is base class and derived class with example?

The class whose members are inherited is called the base class, and the class that inherits those members is called the derived class. A derived class can have only one direct base class. However, inheritance is transitive.