RE: [Dev-C++] #DEFINE versus cont variables in array inicializations

[Ioannis V. <iv...@em...>]

> -----Original Message-----
> From: Per Westermark [mailto:pw...@ia...] 
> Sent: Saturday, May 31, 2003 6:38 AM
> To: Ioannis Vranos
> Cc: Dev-C++ Mailing List
> Subject: RE: [Dev-C++] #DEFINE versus cont variables in array 
> inicializations
> 
> 
> See below
> 
> 
> If you know that you need to take the address in another file, then
> declare it as:
>     extern const int SIZE = 7;


I am sorry to tell you this, but this is *nonsense*. The C++ standard
doesn't require to define it like this.


I can define a const object in the global namespace:

const int x=7;



and in another file I can do this:


#include <iostream>


extern const int x;

// ...


void f()
{
   const unsigned char *p=reinterpret_cast<const unsigned char *>(&x);
 
 
 // Shows SIZE representation in memory in byte values
 // including padding bits
   for(unsigned long i=0; i<sizeof(x); ++i)
      std::cout<<static_cast<short>(p[i])<<" ";
}







> It doesn't. Either make sure that the file that declares SIZE 
> takes it's
> address, or declare it as 'extern const int SIZE = 7;'



Please direct me in the C++ standard where it mentions such a requirement.




Ioannis Vranos
 
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