On Mon, Jun 23, 2008 at 01:43:39PM +0200, Michael Kerrisk wrote:
[...]
> > errno = 0;
> > n = scanf(..., &p);
> > if (n == 1) {
> > printf("OK: %s\n", p);
> > free(p);
> > } else if (errno != 0) {
> > perror("scanf");
> > }
> > else {
> > fprintf(stderr, "expected letters, not \"%s\"\n", ...);
Well, that error message would be OK for sscanf where you could
use the scanned string for the %s above, but not for scanf,
sorry.
> > }
>
> Thanks for that piece of code. I'll include a version of that in the page.
[...]
One may also want to check for (n == EOF), though it's OK to
treat n == 0 and n == EOF the same when you only need to check
the correctness of the input (n==EOF means empty input).
--
Stéphane
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