Checking string for symbols

Posted by Zeno on Sun 13 Feb 2005 07:52 PM — 4 posts, 17,368 views.

Zeno USA Sun 13 Feb 2005 07:52 PM #0

I want to check if a string to make sure that it only consists of spaces, letters, and numbers. I did something like this:

     for ( let = argument; *let != '\0'; let++ )
     {
         if ( !isalpha(*let) )
         {
             send_to_char( "The clan name must only have letters in it.\n\r", ch );
             return;
         }
     }

But a space would mean isalpha returns FALSE. Is there another function to use?

Samson USA Sun 13 Feb 2005 08:17 PM #1

Yes. You can add a call to isspace() and it should do the trick.

Like so:


     for ( let = argument; *let != '\0'; let++ )
     {
         if ( !isalpha(*let) && !isspace(*let) )
         {
             send_to_char( "The clan name must only have letters in it.\n\r", ch );
             return;
         }
     }

Dave Australia Mon 14 Feb 2005 06:30 AM #2

If you want numbers too you'll probably want to use isalnum() instead of isalpha().

Dave

Zeno USA Tue 15 Feb 2005 01:56 AM #3

*nod* I've decided to disallow numbers anyways.