Static Vars in member-functions?

[Martin T.]

Hello.

Is a static Variable in a member function of a class static with regard
to one object, or is it static for all objects of the class?

That is:

class A {
// ...
void func() {
static int x = 0;
x++;
printf("static x = %d", x);
}
//...
};
 
//...
A obj1;
B obj1;
 
obj1.func(); // should print 1
obj2.func(); // does this print 1 or 2 ??
 

best regards,
Martin

[Rolf Magnus]

Martin T. wrote:

Hello.

Is a static Variable in a member function of a class static with regard
to one object, or is it static for all objects of the class?
What does that mean?
Anyway, a static variable in a member function is just the same as a static
variable in any other function. It is initialized when the function is
first called, then re-used in subsequent calls.
That is:

 class A {
  // ...
  void func() {
    static int x = 0;
    x++;
    printf("static x = %d", x);
  }
  //...
 };

 //...
 A obj1;
 B obj1;

 obj1.func(); // should print 1
 obj2.func(); // does this print 1 or 2 ??
 

2

[Martin T.]

Rolf Magnus wrote:

Martin T. wrote:

That is:

 > class A {
 >  // ...
 >  void func() {
 >    static int x = 0;
 >    x++;
 >    printf("static x = %d", x);
 >  }
 >  //...
 > };
 >
 > //...
 > A obj1;
 > B obj1;
 >
 > obj1.func(); // should print 1
 > obj2.func(); // does this print 1 or 2 ??
 > 

2

Thanks