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]

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.]

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