Yeah, it's an overload as others have replied. The difference between C and C++ here, is that you should get a linker error if you try and invoke the undefined

Yeah, it's an overload as others have replied. The difference between C and C++ here, is that you should get a linker error if you try and invoke the undefined overload in C++ (C doesn't allow overloading, nor does it require a forward declaration). This is how we "deleted" functions, especially otherwise auto generated ones such as a default or copy constructor and assignment operator pre C++11.