Say I have a "Ragdoll" class that is composed by 10 "balls"

And the Ball class contains a pointer to the owner ragdoll:
I want the ball class to have a constructor which takes as parameter the pointer to the Ragdoll which owns it:

something like
The problem is I dont know how to call the Ball::Ball constructor when I make a ragdoll!

Say I call

I dont know where-how to specify the argument for the Ball constructor! (I guess there should be a "this" somewhere)

balls[i] = Ball (this); ?

When I call Ragdoll ragdolls[2] it already gives me an error since it does not have the parameter for the Ball constructor.

That would work, though it probably isn't the best method (and you'll have to deal with object destruction yourself.)

Ah, right, so you're getting a compile-time error, right? I don't think you can - you should go with sealfin's way anyway, since it's just... better.

Use a std::vector


Of course, this means you've got to have a copy constructor & assignment operator, since you're essentially pushing a copy into the vector.

Also, since you're not newwing the balls, when your ragdoll object is deleted, the vector will go away too, along with all the balls.

Since it's a pointer, you can just have a pseudo constructor to just initialize the pointer if you want. It would do pretty much the same thing in the end.

the default constructor Ball::Ball() {} gets replaced when you overload it and you need to readd it.