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From: janin@tybalt.caltech.edu (Adam L. Janin)
Newsgroups: comp.sys.mac.programmer
Subject: use of alloca
Message-ID: <8264@cit-vax.Caltech.Edu>
Date: 10 Oct 88 04:04:04 GMT
Sender: news@cit-vax.Caltech.Edu
Reply-To: janin@tybalt.caltech.edu (Adam L. Janin)
Organization: California Institute of Technology
Lines: 20

Thanks to everyone who sent replies about Bison!

There is a much easier way to allocate stuff on the stack in C than using
alloca.  Variable declarations can be put after ANY open brace.  The scope of
the variable is local to the set of braces.  For example:
for (a = 0; a < 10; a++) {
	int x;
	...
	printf("%d", x);	/*  Works correctly	*/
	...
}
printf("%d", x);	/*  Does not work.  Variable not defined here.  */

etc.

Although this works, it is sometimes difficult to read code that contains
statements like this, since it can be hard to find the variable declarations.

	Adam Janin
	janin@tybalt.caltech.edu  or  janin@csvax.caltech.edu