Static Functions in C++

Question

I\'ve read a few posts on here about static functions, but still am running into trouble with implementation.

I\'m writing a hardcoded example of Dijkstra\'s algorit

Answer 1

In your header file Alg.h:

#ifndef __ALG_H__
#define __ALG_H__

namespace Alg {

    void dijkstra();

}

#endif

The include guards are necessary if you plan to include the header in more than one of your cpp files. It seems you would like to put the function in a namespace Alg, right?

In Alg.cpp:

#include "Alg.h"

void Alg::dijkstra() { /* your implementation here */ }

Then, in main.cpp you call it with full namespace qualification:

#include "Alg.h"

int main() {

    Alg::dijkstra();

}

If you just want to distribute your code over several files, I don't see why the function should be declared static.

Answer 2

Now that we have the complete declaration of your class Arg, it feels like the singleton design pattern could be useful:

http://en.wikipedia.org/wiki/Singleton_pattern