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From: Cesar Rabak <csrabak@yahoo.com.br>
Newsgroups: comp.lang.ada
Subject: Re: Translating an embedded C algorithm
Date: Tue, 16 Jan 2007 15:12:44 -0200
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Date: 2007-01-16T15:12:44-02:00
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Ludovic Brenta escreveu:
> Jean-Pierre Rosen a �crit :
>>> A question: I see all the time things like "if (.. < ..)" in C - are the
>>> parentheses required there ?
>> Yes, they are - because C has no "then" keyword. There must be something
>> to tell the compiler where the expression ends...
> 
> Not to mention that the parentheses may contain several expressions
> separated by the comma operator, some or all of which may have side
> effects, and only the last of which actually controls the if
> statement... for example:
> 
> if (a = 1, b = a, c = --a, (a = --b) == c) {
>    ...
> }
> 
> Ah, the joy of obfuscated programming :) :) :)
> 
Would you believe that:

if (a = 1) {
     ...
}

Is semantically valid C, but because it is very easy to mistake this 
when the intended was:

if (a == 1) {
     ...
}

That there are tools to look for and signal this!?