[cs13001] More than one constructor?

[Mikhail Nesterenko]

> 
> I was reading about constructors, and I was wondering, I read that you can have multiple constructors in a class, something like:
> 
> class Date {
> public:
>          Date ( int, int, int);
>          Date (int, int);
>          Date ();  // void constructor
> 
> My question is, how does the compiler know which constructor are we
> using? By the numbers of arguments we pass?
> 

It is perfectly legal to have multiple constructors. This technique is
called function (in this case constructor) overloading. Since
constructor have the same name as a class, they are differentiated by
the number and type of the parameters. 

> What if we had 2 constructors that are Date (int, int, int); would
> that work? If yes, how would the compiler know which one we're
> using?
> 

For that reason, it is not possible to have to constructors with the
same number and type of parameters. The compiler will report something
like:

	ambiguous function overloading: Date::Date(int, int, int)

thanks,
--
Mikhail