Comments on: How to make sure sscanf reads to the end of the line

By: Thomas Thurman

Thomas Thurman — Fri, 21 Mar 2008 11:39:50 +0000

Ah, I did spend a bit of time thinking about using the return value, but I hadn’t thought of the idea of using the dummy variable. Seems kind of obvious now you point it out :) Thanks.

By: Benoît Dejean

Benoît Dejean — Fri, 21 Mar 2008 10:41:01 +0000

Or you could just check sscanf return value ?

By: Stef

Stef — Fri, 21 Mar 2008 09:32:52 +0000

You could also use the fact that sscanf returns the number of fields successfully read. Put a dummy %c at the end of the format and check that
the result is equal to the number of % fields before it:

void
check(char *string)
{
char dummy;
int workspace ;

int NB_FIELD=1 ;
int nb = sscanf (string, “Workspace %d%c”, &workspace, &dummy);

printf (“Input is [%s], fully=%s\n”,
string, (nb==NB_FIELD) ? “Yes”:”No”);
}