Is f(void) deprecated in modern C and C++?

c, c++, refactoring, void

Solution

In C, the declaration `int f(void)` means a function returning int that takes no parameters. The declaration `int f()` means a function returning int that takes any number of parameters. Thus, if you have a function that takes no parameters in C, the former is the correct prototype.

In C++, I believe `int f(void)` is deprecated, and `int f()` is preferred, as it specifically means a function that takes no parameters.

Problem

I'm currently refactoring/tidying up some old C code used in a C++ project, and regularly see functions such as: ``` int f(void) ``` which I would tend to write as: ``` int f() ``` Is there any reason not to replace (void) with () throughout the codebase in order to improve consistency, or is there a subtle difference between the two that I am unaware of? More specifically, if a virtual member function in C++ is described as: ``` virtual int f(void) ``` and a derived class includes a member function: ``` int f() ``` is this a valid override? Additionally, am I likely to encounter any linker problems based on almost identical signatures?

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