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Re: Need help with basic spawn command [message #54060 is a reply to message #54059]

Thu, 17 May 2007 08:12

James Kuyper
Messages: 425
Registered: March 2000

Senior Member

ryanselk@gmail.com wrote:
> Im running IDL on XP.
>
>
>
> I have this basic C code:
>
>
> #include <stdlib.h>
>
> int main()
> {
>
> int n=5;
> n=n*2;
> return n;
> }
> //This file is basic.c
>
>
>
>> From IDL, I just want to call this program and return n.
>
>
>
> In IDL, I can write:
>
> SPAWN, 'basic' ; this of course runs the
> basic.c program.
>
>
> But this doesnt return anythingof course.. ive tried to add another
> variable after this line such as:
> SPAWN, 'basic', variable

'variable' is supposed to contain whatever output your program
produces - in C terms, it contains whatever was written to stdout.
Your program doesn't write anything to stdout, so variable won't
contain any information. If you want to retrieve the exit status, what
you want is:

SPAWN, 'basic', EXIT_STATUS=variable

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[Message index]

		Re: Need help with basic spawn command By: ryanselk on Thu, 17 May 2007 08:32
		Re: Need help with basic spawn command By: James Kuyper on Thu, 17 May 2007 08:12
		Re: Need help with basic spawn command By: Vince Hradil on Thu, 17 May 2007 07:02
		Re: Need help with basic spawn command By: yp on Thu, 17 May 2007 05:46
		Re: Need help with basic spawn command By: Allan Whiteford on Thu, 17 May 2007 04:14
		Re: Need help with basic spawn command By: yi.selab on Thu, 17 May 2007 01:45
		Re: Need help with basic spawn command By: Trae on Tue, 22 May 2007 05:55

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