RE: Evaluate an string.

This is a multi-part message in MIME format. ------=_NextPart_000_0004_01BDE881.D6E37CE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit I have a 4GL function that evaluates arithmetic expressions using polish notation. If you are interested in it, just let me know. ------=_NextPart_000_0004_01BDE881.D6E37CE0 Content-Type: message/rfc822 Content-Transfer-Encoding: 7bit Content-Disposition: attachment Reply-To: <kagel@bloomberg.net> From: "Art S. Kagel" <kagel@bloomberg.net> Sender: <owner-informix-list@iiug.org> To: <informix-list@iiug.org> Subject: Re: Evaluate an string. Date: Thu, 24 Sep 1998 13:11:01 -0400 Organization: Bloomberg LP Message-ID: <360A7D25.663C@bloomberg.net> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook 8.5, Build 4.71.2173.0 X-From_: owner-informix-list@iiug.org Thu Sep 24 06:11:08 1998 X-List-Gateway: comp.databases.informix X-MimeOLE: Produced By Microsoft MimeOLE V4.72.2106.4 Importance: Normal Juan Manuel Hernandez del Olmo wrote: > > Evaluate an string. > ------------------------------ > I would know if it is possible, in 4GL, to evaluate an string. For = > example: > > If I have: > > let cad='var1+var2*var3' > > Could I get something like this: > > num=eval cad > > So, if var1,var2 and var3 are integers, and its values are 1,2 and 3, the = > value of num would be 6. Actually 1+2*3 is either 7 or 9 depending on the order of evaluation. Using standard rules that would be 7. Anyway... No you cannot do this. You will have to build your own expression parser for this. Art S. Kagel ------=_NextPart_000_0004_01BDE881.D6E37CE0--