Study day part 1: Copycat

So, what's a copy constructor? I donno. I mean I do, but I forgot. To Wikipediaaaa!!

A copy constructor is a special constructor in the C++ programming language for creating a new object as a copy of an existing object. The first argument of such a constructor is a reference to an object of the same type as is being constructed (const or non-const), which might be followed by parameters of any type (all having default values).

 Examples of these are:

cclass(const cclass& copy) 

{

     this->num = copy.num;

}

The following cases may result in a call to a copy constructor:
1. When an object is returned by value

cclass CC = getClass(num);

2. When an object is passed (to a function) by value as an argument

foo(CC);

3. When an object is thrown

throw CC;

4. When an object is caught

catch (CC)

And, to finish off, I need a full example.
    ////*class*////

Point::Point(const Point& p) {

   x = p.age;

   y = p.num;

}

   ////*Main*////

Point p;       // calls default constructor

Point s = p; // calls copy constructor.

p = s;          // assignment, not copy constructor, need to overload the "=" operator