We use constructors to initialize the object with the default or initial state . The default values for primitives may not be what are you looking for. Another reason to use constructor is that it informs about dependencies.
Read moreWhat is the role of constructor in classes in C?
Explanation: A constructor is used in classes to initialize data members of class in order to avoid errors/segmentation faults .
Read moreShould I always use a constructor?
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 moreWhy do we need empty constructor in C#?
If you declare an empty constructor, the C# compiler will not dynamically generate a parameter-less constructor . If you do not use an access modifier with the constructor, it will also become a private constructor by default. Using the private keywords makes it obvious for developers by explicitly stating the type.6 Ağu 2019
Read moreIs a constructor necessary?
A constructor is a special method of a class that initializes new objects or instances of the class. Without a constructor, you can’t create instances of the class . Imagine that you could create a class that represents files, but without constructors, you couldn’t create any files based on the class.
Read moreWhat will happen if there are no constructor in C++?
If your class has no constructors, C++ will automatically generate a public default constructor for you . This is sometimes called an implicit constructor (or implicitly generated constructor).
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