[c-prog] Re: Non integral type class constant - How?

[do_right]

--- In c-prog@yahoogroups.com, Gleb Orlov <lindows_...@...> wrote:
>
> Hello, Olufowobi.
> 
> Your code:
> 
> >I need to achieve class constant for integral type
> >________________________________
> >
> >class Ball{
> >static const int radius = 10;
> >};
> >
> >I have tried,
> >class Ball
> >{
> >const static double radius ;
> >
> >};
> >Ball::radius = 10.0;
> >
> >________________________________
> 
> Answer:
> //==============================================================================
> #include <iostream.h>
> #pragma argsused   //pragma of Borland C++ Builder 5.
> //==============================================================================
> class Ball
> {
>  const double radius;
>  const static double circle;
>  public:
>           Ball():radius(12.3){}  //Initialise value 'radius' in construtor
--------------------
------------------
> 
>  Gleb                          mailto:lindows_...@...


Hello All,

namespace para{

    const double DIA = 18;

 class Parameters
    {


    public:
        Parameters();
}



}


I ended up doing  this. so I can have para::DIA

Thanks,I may switch to the last suggestion. 
But I really don't get why (instantiating class variable const) only works for 
integral types (bool,int, char) and not other types.

Olufowobi Lawal.