Is there any way how can I share one variable (object of class) over more instances of another class? Static member is not what I am looking for. I know that one variable (large object) will be shared among more instances (but not all of them). How can I do that in C++? Thanks for any help.
Example:
class ClassA {
public:
...
private:
ClassB object; // this variable will be shared among more instances of ClassA
}
Well, you'll need to move the member out of the class, and store a pointer instead. You'll also need to count the instances that refer to that independent object. That's a lot of work, but fortunately the C++ standard library has you covered with std::shared_ptr:
class ClassA {
public:
// ...
private:
std::shared_ptr<ClassB> object; // this variable will be shared among more instances of ClassA
};