C++: What is the size of an object of an empty class?

by

Quoting Bjarne Stroustrup’s C++ Style and Technique FAQ, the reason the size is non-zero is “To ensure that the addresses of two different objects will be different.” And the size can be 1 because alignment doesn’t matter here, as there is nothing to actually look at.

More Related Contents:

  1. Why ‘&’ reference in not required in classes in C++?
  2. sizeof class with int , function, virtual function in C++?
  3. passing object by reference in C++
  4. When should you use a class vs a struct in C++?
  5. How do I remove code duplication between similar const and non-const member functions?
  6. How can I use cout
  7. What is the difference between private and protected members of C++ classes?
  8. Memory management in Qt?
  9. What is the ‘this’ pointer?
  10. C++11 allows in-class initialization of non-static and non-const members. What changed?
  11. How to copy/create derived class instance from a pointer to a polymorphic base class?
  12. using namespace std; in a header file
  13. How to create two classes in C++ which use each other as data?
  14. What is dynamic initialization of object in c++?
  15. How do you use the non-default constructor for a member?
  16. Mesh class called with default constructor not working OpenGL C++
  17. C++ inherit from multiple base classes with the same virtual function name
  18. Is “inline” implicit in C++ member functions defined in class definition
  19. How to use a class in DLL?
  20. Somehow register my classes in a list
  21. Mixing class and struct
  22. When do programmers use Empty Base Optimization (EBO)
  23. Comparing two instances of a class
  24. What happens when a function that returns an object ends without a return statement
  25. Making a vector of instances of different subclasses
  26. Why can’t redefine type names in class in C++?
  27. Can you start a class name with a numeric digit?
  28. What is the purpose of forward declaration?
  29. Forward Declaration of variables/classes in std namespace
  30. Scope resolution operator being used twice

Leave a Comment