Is there a difference between foo(void) and foo() in C++ or C?

by

In C:

  • void foo() means “a function foo taking an unspecified number of arguments of unspecified type”
  • void foo(void) means “a function foo taking no arguments”

In C++:

  • void foo() means “a function foo taking no arguments”
  • void foo(void) means “a function foo taking no arguments”

By writing foo(void), therefore, we achieve the same interpretation across both languages and make our headers multilingual (though we usually need to do some more things to the headers to make them truly cross-language; namely, wrap them in an extern "C" if we’re compiling C++).

More Related Contents:

  1. C++ Creating a parking charge
  2. How do I expand a tuple into variadic template function’s arguments?
  3. How can I pass a member function where a free function is expected?
  4. What is the difference between _tmain() and main() in C++?
  5. How do I pass a unique_ptr argument to a constructor or a function?
  6. Why can’t we pass arrays to function by value?
  7. How to use a member variable as a default argument in C++?
  8. Is there a way to pass auto as an argument in C++?
  9. When to use const and const reference in function args?
  10. C++ preprocessor: avoid code repetition of member variable list
  11. Can I set a default argument from a previous argument?
  12. Is there a way to use C++ preprocessor stringification on variadic macro arguments?
  13. Skip some arguments in a C++ function?
  14. Using base pointer register in C++ inline asm
  15. Compilers and argument order of evaluation in C++
  16. C state-machine design [closed]
  17. C++ templates Turing-complete?
  18. C++11 allows in-class initialization of non-static and non-const members. What changed?
  19. What is the difference between “long”, “long long”, “long int”, and “long long int” in C++?
  20. Is string::c_str() no longer null terminated in C++11?
  21. in C++ , what’s so special about “_MOVE_H”?
  22. Should I pass an std::function by const-reference?
  23. Reinterpret_cast vs. C-style cast
  24. C++ Get all bytes of a file in to a char array?
  25. What are good practices regarding shared libraries on Linux?
  26. Memory Allocation char* and char[]
  27. How to load a custom binary resource in a VC++ static library as part of a dll?
  28. When and why would you use static with constexpr?
  29. Benefits of using reserve() in a vector – C++
  30. Checking if all elements of a vector are equal in C++

Leave a Comment