Static class objects

[scoobydoo666]

Hi
What is the use of declaring a class object as static?
Eg: Class Base{
public:
...........
Base(1){}
..........
.........
};
main(){
static Base obj(1)j;
}
I get compile error when I try to call default constuctor : Base()

Thanks

[weaknessforcats]

Maybe your constructor should take an int as an argument rather than a 1.

[scoobydoo666]

Yes weaknessforcats. you are right. It was a mistake

Class Base{
public:
.
Base(){}
...........
Base(int j){}
..........
.........
};
main(){
static Base obj(1)j;
}

please tell me the the use of declaring a class object as static?

Thanks

[weaknessforcats]

You want the obect to be usable only in the file where it is created.

Actually, this use of static in deprecated in C++ as are most uses of the static keyword, like static functions. You are supposed to use namespaces instead.

A static object as you describe should be in an anonymous namespace.

namespace
{
Base obj(1)j;
 
}
int main()
{
 
}
 

is the replacement for:

static Base obj(1)j;
 
}
int main()
{
 
}
 

[scoobydoo666]

Thanks a lot weaknessforcats. I got it

[scoobydoo666]

But why can't I call default constuctor?
static Base b();

I get compile error (KDE) :
" error: cannot declare static function inside another function"

Thanks