Declaring automatic variables inside a while loop

["Swaminathan Venkatakrishnaprasad" <vswami at agere dot com>]

Hello,

Could you please let me know if it is 
valid to declare an automatic variable 
inside a for loop. If yes, is it also allowed
in ANSI standard (could you please refer
me to the sec #).

Example:
void f()
{
    int i;
    i = 10;
    while(i >=0 )
    {
       int j;
       i=j;
       printf("j=%d \n", j);
       i--;
    }
return;
}

Also, in the above example would
the number of iterations contribute anything to the stack
size since an automatic variable is declared
inside the while loop??

Your input is very much appreciated.

Thanks & Regards,
Swaminathan Venkat