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Re: MathLink Help

• To: mathgroup at smc.vnet.net
• Subject: [mg44460] Re: MathLink Help
• From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
• Date: Mon, 10 Nov 2003 19:55:45 -0500 (EST)
• Organization: Universitaet Leipzig
• References: <boig64$ogm$1@smc.vnet.net>
• Reply-to: kuska at informatik.uni-leipzig.de
• Sender: owner-wri-mathgroup at wolfram.com

Hi,

remove the ToString[] and read the expression in a
tree (or an other data structure you like) .

Regards
  Jens

Ibrahim El wady wrote:
> 
> Dear Math Group
>   I try connect to Mathmatica using MathLink in Visual C++.
>   When I try execute D[x^2 *Sin[x],x]
> 
> I write
> 
> MLPutFunction(lp, "EvaluatePacket", 1);
>      MLPutFunction(lp, "ToString", 1);
>         MLPutFunction (lp, "ToExpression", 1);
>         MLPutString(lp, "D[x^2 *Sin[x],x]");
> MLEndPacket(lp);
> 
> I receive
> 
>    2\012x  Cos[x] + 2 x Sin[x]
> 
> My question
>   How I understant the result
> 
> Thank you for help