On Sun, 25 Jul 1999, Mike Davis wrote:
> Brace Requirements:
>
> I have been using Switch/Case statements forever. But I found an
> example that makes me wonder if I have misunderstood something.
>
> I get a compile error with the below code if I don't use braces as
> shown in the 'case' statement. I know it's because of theChr
> declaration but I don't understand why or how the braces fixes the
> problem. I have never used braces before in case statements.
>
> What's up?
most C compilers will not allow you to declare a variable
unless you declare it at the beginning of some scope.
when you put a '{' there, you are declaring a new block
scope, so the compiler is more than happy to accept it.
without it, the scope is the case statement.. and since you
already have statements before this declaration - it barfs.
GOOD: BAD:
switch (myVar) switch (myVar)
{ {
case a: case a:
{ // declaration
// declaration }
}
}
this stuff is 'standard' C stuff.. some compilers are however
leniant on this rule.. they let you get away with it :>
gcc for sure will not.
i believe it is in the ANSI specification.
az.
--
Aaron Ardiri
Lecturer http://www.hig.se/~ardiri/
University-College i G�vle mailto:[EMAIL PROTECTED]
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