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Whenever an object is declared as const, it needs to be initialized at the time of declaration.When a function is declared as const, it can be called on any type of object, const object as well as non-const objects.
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An object declared as const cannot be modified and hence, can invoke only const member functions as these functions ensure not to modify the object. Like member functions and member function arguments, the objects of a class can also be declared as const.
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const int *const ptr_3 = &value // ptr_3 points to a “const int” value, so this is a const pointer to a const value. int *const ptr_2 = &value // ptr_2 points to an “int”, so this is a const pointer to a non-const value.Ĥ. const int *ptr_1 = &value // ptr_1 points to a “const int” value, so this is a pointer to a const value.ģ. In nutshell, the above discussion can be concluded as follows:Ģ. Output: The compile-time error that will appear as if const value is passed to any non-const argument of the function then the following compile-time error will appear: Must Do Questions for Companies like TCS, CTS, HCL, IBM ….What's the difference between Scripting and Programming Languages?.Functional Dependency and Attribute Closure.Microsoft's most asked interview questions.Differences and Applications of List, Tuple, Set and Dictionary in Python.Pure Virtual Functions and Abstract Classes in C++.Some interesting facts about static member functions in C++.Why is the Size of an Empty Class Not Zero in C++? 1 day ago &0183 &32 MINNEAPOLIS, Ma/PRNewswire/ - President Bidens 'State of the Union' address before Congress this week a speech that announced a 41 billion investment in combatting drug.Can a C++ class have an object of self type?.Virtual Functions and Runtime Polymorphism in C++ | Set 1 (Introduction).ISRO CS Syllabus for Scientist/Engineer Exam.ISRO CS Original Papers and Official Keys.GATE CS Original Papers and Official Keys.