Home » Other » Training & Certification » OUT & IN OUT
OUT & IN OUT [message #287553] Wed, 12 December 2007 11:29 Go to next message
ORAGENASHOK
Messages: 240
Registered: June 2006
Location: Chennai
Senior Member
Can we use OUT and IN OUT parameter in the function.

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Re: OUT & IN OUT [message #287555 is a reply to message #287553] Wed, 12 December 2007 11:45 Go to previous messageGo to next message
BlackSwan
Messages: 26766
Registered: January 2009
Location: SoCal
Senior Member
>Can we use OUT and IN OUT parameter in the function.
Can we? Yes
Should you? NO!

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Re: OUT & IN OUT [message #287556 is a reply to message #287553] Wed, 12 December 2007 11:47 Go to previous messageGo to next message
srinivas.k2005
Messages: 404
Registered: August 2006
Senior Member
When we can use it, then why should not we use it.Is there any strong reason why we should not use it,please explain

Thanks,
Srinivas

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Re: OUT & IN OUT [message #287560 is a reply to message #287553] Wed, 12 December 2007 11:56 Go to previous messageGo to next message
Michel Cadot
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Registered: March 2007
Location: Saint-Maur, France, https...
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Yes you can (syntaxically) and yes you can (logically).
Some said you should not, I say if you want.
The most important point is to document when you can use it and you must not.

Regards
Michel

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Re: OUT & IN OUT [message #287561 is a reply to message #287553] Wed, 12 December 2007 12:06 Go to previous messageGo to next message
BlackSwan
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Registered: January 2009
Location: SoCal
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http://en.wikipedia.org/wiki/Function_%28computer_science%29
the classic/formal definition of a functions says that a single value is RETURNED by the function.
IMO, when more than 1 value can be returned, then a procedure should be used.

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Re: OUT & IN OUT [message #287569 is a reply to message #287561] Wed, 12 December 2007 12:55 Go to previous message
Michel Cadot
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Registered: March 2007
Location: Saint-Maur, France, https...
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Most of standard C functions does not wotk that way.
They return a "return code" as the function value and data in out parameters.

Regards
Michel

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