From: rbs{at}snippets.org
To: c_echo{at}yahoogroups.com

Quoting Rob Swindell:

>  > Since using "=" when you mean "==" is one of
the most common mistakes
>  > (usually, it's a typo and is even made by experienced C programmers),
>  > putting the constant on the left changes the compiler's action from a
>  > warning to an error.
>  >
>  > if (x == 6)	/* what you mean */
>  >
>  > if (x = 6)	/* warning, possible unintended assignment */
>
> Yes, and modern compilers will give you a "possibly incorrect
assignment"
> warning, bringing this to your attention.

Yes, that's what I said.

>  > if (6 = x)	/* error, assignment to a constant */
>
> So now you have an error instead of a warning. 

Warnings can be ignored, errors cannot.

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