Do I need default constructor C++?

Deleting the default constructor of a class is a good idea when there are multiple choices for the default or uninitialised state .

Answer: C++ Empty constructor necessity depends upon class design requirements . We know that C++ class constructor is called when we create an object of a class. If a class is not required to initialize its data member or does not contain data member, there is no need to write empty constructor explicitly.10 Eki 2016

Java doesn’t require a constructor when we create a class . However, it’s important to know what happens under the hood when no constructors are explicitly defined. The compiler automatically provides a public no-argument constructor for any class without constructors. This is called the default constructor.