[Dev-C++] RE: reference question

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

> -----Original Message-----
> From: Ioannis Vranos [mailto:iv...@em...] 
> Sent: Friday, September 05, 2003 6:20 PM
> To: Dev-C++ Mailing List (dev...@li...)
> Subject: reference question
> 
> 
> C++:
> 
> 
> Has anyone any idea why this compiles:
> 
> int main()
> {
>  char c;
>  
>  char * const &r=&c;
> }
> 
> 
> 
> and this does not:
> 
> 
> int main()
> {
>  char c;
>  
>  char * &r=&c;
> }


And the answer is that a temporary char * const (&c) is assigned to char *
const &r. That is a temporary pointer variable of the type char * const
(const means it cannot point in another char) is created, holding the
address of c.


An example code:

#include <iostream>



int main()
{
 char c=0;
 
 char * const &r=&c;
 
 
 std::cout<<static_cast<void *>(r)<<std::endl;
 std::cout<<static_cast<void *>(&c)<<std::endl;

}


But in general references can be used to point to specific pointers, using
templates only.






Ioannis Vranos
 
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