C++ class constructor

A constructor is automatically called when an object is created . It must be placed in public section of class. If we do not specify a constructor, C++ compiler generates a default constructor for object (expects no parameters and has an empty body).

A class is defined in C++ using keyword class followed by the name of the class . The body of the class is defined inside the curly brackets and terminated by a semicolon at the end.

In C++, a class defined with the class keyword has private members and base classes by default. A structure is a class defined with the struct keyword. Its members and base classes are public by default.

There are two ways to initialize a class object:

A class declaration creates a unique type class name . A class specifier is a type specifier used to declare a class. Once a class specifier has been seen and its members declared, a class is considered to be defined even if the member functions of that class are not yet defined.