C++ Composition?

Question

I'm stuck trying to understand composition in c++. I don't want to move on until I understand it. Can somebody give me a good explanation or link me a tutorial for this? It'd be greatly appreciated.

Answer 1

http://www.cplusplus.com/doc/tutorial/

Answer 2

To the best of my memory, it's about having an object of class A as a member of class B.

If class B inherits from class A, we say that class B is-a class A. E.g. A fish is an animal. The fish has traits of an animal.

If class B contains an object of class A (composition), we say that class B has-a class A. E.g. A kid has a ball.

class Ball {
int radius, diameter;
// etc
};
class Kid {
Ball myBall;
// etc
};

Answer 3

Thanks Izaak GOLDSTEIN

Answer 4

Maybe little help you

Answer 5

I know it as function composition. If you have two functions `f(x)` and `g(x)`, then a function returning `f(g(x))` is called the composition of `f` and `g`.