On Tue, Jun 25, 2002 at 01:28:39PM -0400, Kevin OKeefe wrote:
> The way you want to check this is:
>
> if(tempcharstar)
> {
> if(*tempcharstar)
> {
> StrCopy(string, tempcharstar);
> }
> }
>
> or,
>
> if(tempcharstar && *tempcharstar)
> StrCopy(string, tempcharstar);
>
>
> First see if the pointer is not NULL (there is a pointer), then, if there is a
>pointer, see if there is a character in there (it's actually pointing at a string).
>The second method depends on the compiler evaluating the left-hand side before the
>right, which I believe is a decent assumption.
It's called short circuit evaluation, and it's mandatory in C for
every compiler (for logical binary operators).
Marco
--
========================================================================
Marco Pantaleoni [EMAIL PROTECTED]
Padova, Italy [EMAIL PROTECTED]
elastiC language developer http://www.elasticworld.org
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