What is the difference between constructor and default constructor?

Default constructor is created only if there are no constructors. If you define any constructor for your class, no default constructor is automatically created. A Default constructor is defined to have no arguments at all as opposed to a constructor in general which can have as many arguments as you wish.

What is parameterized and default constructor in C++?

A default constructor is a constructor that either has no parameters, or if it has parameters, all the parameters have default values. If no user-defined constructor exists for a class A and one is needed, the compiler implicitly declares a default parameterless constructor A::A() .

What is implicit default constructor in C++?

What is implicit constructor in C++?

implicit constructor is a term commonly used to talk about two different concepts in the language, the. implicitly declared constructor which is a default or copy constructor that will be declared for all user classes if no user defined constructor is provided (default) or no copy constructor is provided (copy).

What is the default constructor in C++?

A default constructor is a constructor that either has no parameters, or if it has parameters, all the parameters have default values. This constructor is an inline public member of its class. The compiler will implicitly define A::A() when the compiler uses this constructor to create an object of type A .

What is default constructor called in C++?

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).

Does C++ provide default constructor?

C++ does generate a default constructor but only if you don’t provide one of your own. The standard says nothing about zeroing out data members. By default when you first construct any object, they’re undefined.

What is a default constructor in C++?