If you don’t implement a constructor, the compiler will implictly create a default constructor if the class needs a constructor. So it depends on what you’re really asking. If you’re asking if you can write a class without explicitly creating a user defined constructor, yes you can do that.
Read moreWhat if we dont use constructor?
you wouldn’t be able to create objects/instances of classes , basically: you would only be able to use primitive datatypes. Even you don’t write any constructor, a default constructor exists there. So you can still create objects without passing any parameters.
Read moreAre default constructors necessary?
The compiler-defined default constructor is required to do certain initialization of class internals . It will not touch the data members or plain old data types (aggregates like an array, structures, etc…). However, the compiler generates code for the default constructor based on the situation.9 Oca 2022
Read moreShould I write default constructor?
You should only implement your own default constructor it it does anything else then the one the compiler would generate. If you want to give the reader a hint, you can replace the implementation with = default in C++11.
Read moreWhy is the default constructor being called?
A class does so by defining a special constructor, known as the default constructor. This constructor is called the default constructor because it is run “by default;” if there is no initializer, then this constructor is used . The default constructor is used regardless of where a variable is defined.
Read moreDoes the default constructor always get called?
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).24 Şub 2022
Read moreWhat does a default constructor do 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() .
Read more