copy of complex numbers?

[merse]

Let us have a complex class with two double data member.
If I would like to copy it by reference
that means that I have two copy one or two pointers?

[mrnutty]

In C++ term of reference or in general ?

You can do this :

Complex& Complex::getClass() { return *this; }

That way, you get the Complex class as a reference in terms of the reference operator.

[merse]

No, my question is not the syntax!
My question is about the compiling and the speed!
So if I have a function:

void function(complex c);

or

void function(complex& c);

works faster?
In the second case, only one or two pointer are copied?