Answer Posted / saugat biswas

I think all the answers above are restricted to C only.
However if extended to C++, static has a file scope and the
static variable is a variable for the class and not the
instances. In other words, static variables are shared
variables. All the instances of the class actualy use the
same static variable. Static variables and function can
directly be called without creating instances of the class
by using scope resolution operator. Static variables are
not initialized in constructors rather they are initialized
as global variables. Example

Example.h
~~~~~~~~~
class A
{
public:
static int x;
A();
~A();
static int getX(void);
}

Example.cpp
~~~~~~~~~~~
int x = 0;
A() //Contructor
{}

~A() //Destructor
{}

int getX(void)
{
return x;
}

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Now in class B we can write:

#include "Example.h"
class B
{
int myX = Example::getX();
}

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