Variable argument lists.

[Lawrence V. Cipriani]

In article <3569 at ece-csc.UUCP>, jnh at ece-csc.UUCP (Joseph Nathan Hall) writes:
> In article <14139 at brl-adm.ARPA> bates%falcon.dnet%fermat at bru.mayo.edu (Cary Bates) writes:
> >
* %       Does anybody know (or care) why in ANSI standard C when 
* %       using a variable length argument list, there is no way to 
* %       determine how many arguments where passed into the function?
* 
* That's because in theory one of the "fixed" arguments in your function's
* argument list should indicate, either directly with a count, or indirectly
* (like printf), how many arguments follow in the variable-length portion
* of the argument list.
* 

Nope.  For example, it is perfectly legal to have:

	p = cat(s1, s2, ..., sn, (char *)0);	/* pseudo C */

where all the si are strings.  There is no count passed, and there
is not a printf like format argument.  cat() can be called with
however many strings (si) you want, even 0.


-- 
Larry Cipriani, AT&T Network Systems and Ohio State University
Domain: lvc at tut.cis.ohio-state.edu
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