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Article View: comp.lang.c++.moderated
Article #50

Re: enum expression is IF statement

#50
From: Nasser Abbasi
Date: Tue, 13 Feb 1996 23:51
49 lines
1700 bytes
In article <4fq7dc$pac@netlab.cs.rpi.edu>, 
P.v.Klaveren@bcs.cs.philips.com says...
>
>enum
>{
>   CSEQ_IDLE,
>   CSEQ_ERROR,
>   CSEQ_ABORT,
>   CSEQ_WAIT4RESPONSE
>};
>
>int state = 3;
>
>if (state == CSEQ_WAIT4RESPONSE)
>{
>    // this code is not executed!!!
>    ...
>}
>
>BOOL expr_is_valid = state == CSEQ_WAIT4RESPONSE;
>
>if (expr_is_valid)
>{
>    // this code IS executed!!!
>    ...
>}
>
>
>I know it is not recommended to compare integers with enumeration
>values, but why on earth is 'expr_is_valid' TRUE but seems
>'state == CSEQ_WAIT4RESPONSE' to result in FALSE (at least in a if
>expression calcuation)?
>

The code works fine on my C++ compiler (Visuall C++ 1.51).
i.e. both IF statments above get executed (as one would expect).

can you post a small complete example (with #include statments) that 
shows the problem? 

what compiler are you using? 

Nasser


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Path: arc1-ca.pugleaf.net!library.erc.clarkson.edu!rpi!not-for-mail
From: nababs@qualcomm.com (Nasser Abbasi)
Newsgroups: comp.lang.c++.moderated,comp.lang.c++
Subject: Re: enum expression is IF statement
Date: 13 Feb 1996 23:51:38 -0000
Organization: Qualcomm Inc.
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