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From: muttiah@stable.ecn.purdue.edu (Ranjan S Muttiah)
Newsgroups: comp.lang.c
Subject: scope Q
Message-ID: <1991Apr19.151959.6847@noose.ecn.purdue.edu>
Date: 19 Apr 91 15:19:59 GMT
Article-I.D.: noose.1991Apr19.151959.6847
Sender: root@noose.ecn.purdue.edu (ECN System Management)
Organization: Purdue University Engineering Computer Network
Lines: 23

/* Is there some way I can control the scope of a variable within
a file ?  Something similar to #undef when using #define */

int a,b;

fn1(..)
{
....
}

fn2(..)
{
....
}

/* beep beep, useful life of a is over */

fn3()
{

a = 5;  <- undefined variable: a
...
}