Question

Given the following code:

#pragma once  class B { public:      B(void)     {     }      ~B(void)     {     } }; 

I know I can also write this:

#pragma once  class B { public:      B()     {     }      ~B()     {     } }; 

What is the purpose of having void in the first example? Is it some type of practice that states the constructor take zero parameters?

Answer 1

The two are same, at least in C++. In C, providing an empty pair of parentheses typically means an unspecified parameter list (as opposed to an empty parameter list). C++ does not have this problem.

How can a correct answer get downvoted so many times? Yet another SO bug?