Which function is automatically called in C++ if we do not define it in a class?
Question
Which function is automatically called in C++ if we do not define it in a class?
Solution
In C++, if a function is not defined within a class, the compiler automatically provides a default constructor, which is called when an object of the class is instantiated without any arguments. This default constructor initializes member variables to their default values. If you do not explicitly define a constructor for a class, the compiler-generated default constructor will be invoked automatically.
Additionally, if there are no user-defined copy constructors or assignment operators, the compiler will also provide a default copy constructor and default assignment operator. These automatically generated functions perform a shallow copy of the object's member variables.
Understanding these concepts is crucial as it highlights the distinction between implicitly provided functions and user-defined behavior in object-oriented programming within C++.
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