From: horst DOT kraemer AT t-online DOT de (Horst Kraemer)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: variable declaration in for-header fails??
Date: Thu, 13 Jan 2000 20:13:13 GMT
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On Thu, 13 Jan 2000 10:42:55 GMT, karpfenteich AT gmx DOT de (Peter Karp)
wrote:

> This first way compiles flawlessly with version 2.03:
 
> #include <iostream>
> using namespace std;
 
> int main()
> {
>   int x;
>   for(x=1, cout << x , x++ ;x<=100; x++)
>     cout << ", " << x;
> 
>   cout << endl;
> 
>   return(0);
> }
 
Correct. 
 
> ------------
> but fails, when I define the counter inside the loop declaration:
> 
> #include <iostream>
> using namespace std;
 
> int main()
> {
>   for(int x=1, cout << x , x++ ;x<=100; x++)
>     cout << ", " << x;
> 
>   cout << endl;
> 
>   return(0);
> }
 
> BTW, Borland C++ 3.1 compiles this version without an error, while


This is a open lie ;-) Borland C++ 3.1 doesn't compile it for the same
reason as GNU C++ doesn't. 

And of course BCC++ 3.1 doesn't support the syntax <iostream> and
doesn't support 'namespace'. But even after changing this it doesn't
compile.


         int x=1, cout << x , x++ ;

is illegal. You cannot separate a declaration and an expression like
cout<<x by a comma.

You can use _either_ a declaration like int x=1; _or_ an expression
like

	x=1,...,....,...;


but you can't have both.


Regards
Horst