Comments on: 7.14 — Ellipses (and why to avoid them) http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/ Tue, 07 Feb 2012 12:30:29 +0000 hourly 1 http://wordpress.org/?v=3.2.1 By: abhishekchauhan http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-96223 abhishekchauhan Fri, 28 Oct 2011 07:53:45 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-96223 I know this is a very late reply, but here's the answer for benefit of those who are visiting this page for the first time... The first argument to your function FindAverage() should have been the number of variable list arguments. You've passed 71 there. This means, the program will keep on looking at 71*sizeof(int) bytes of memory and will do your job, the exact issue pointed out in this article. Really guys, don't use "ellipsed" functions as far as possible. Try to use the concept of passing an array of pointers instead(the way they are passed in main()). I know this is a very late reply, but here’s the answer for benefit of those who are visiting this page for the first time…

The first argument to your function FindAverage() should have been the number of variable list arguments. You’ve passed 71 there.

This means, the program will keep on looking at 71*sizeof(int) bytes of memory and will do your job, the exact issue pointed out in this article.

Really guys, don’t use “ellipsed” functions as far as possible. Try to use the concept of passing an array of pointers instead(the way they are passed in main()).

]]> By: AndresJak http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-95290 AndresJak Tue, 29 Mar 2011 17:51:13 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-95290 Why is it when I use big numbers, for example FindAvarage(71,73,85), or any other big numbers it gives me bizarre answers every time(first i thought it was my programs code was wrong, but than i used your code and it still gave me weird answers) i run the program or, or i missed something you mentioned. Why is it when I use big numbers, for example FindAvarage(71,73,85), or any other big numbers it gives me bizarre answers every time(first i thought it was my programs code was wrong, but than i used your code and it still gave me weird answers) i run the program or, or i missed something you mentioned.

]]> By: Bob http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-91403 Bob Sat, 04 Sep 2010 20:44:16 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-91403 Or he should add a report spam button, or even a "vote spam" so if Alex isn't around people can vote spam off and wait for admin approval. Or he should add a report spam button, or even a “vote spam” so if Alex isn’t around people can vote spam off and wait for admin approval.

]]> By: twilight http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-66647 twilight Wed, 19 Aug 2009 12:17:29 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-66647 oh, how nice you are... and we even know what exactly it is you are upset about... oh, how nice you are… and we even know what exactly it is you are upset about…

]]> By: baldo http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-66475 baldo Mon, 17 Aug 2009 15:41:16 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-66475 Hey Alex, I suggest cleaning many of the spam or useless comments because they clutter the rest of comments that are really useful. Thanks! Hey Alex, I suggest cleaning many of the spam or useless comments because they clutter the rest of comments that are really useful. Thanks!

]]> By: Gates Bill http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-64790 Gates Bill Wed, 22 Jul 2009 17:34:26 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-64790 Fuck you Fuck you

]]> By: a http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-60230 a Fri, 08 May 2009 02:50:52 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-60230 "Consequently, the first call to va_arg will only read the first 4 types of the double (producing a garbage result), " shouldn't that read "first 4 <i>bytes</i>"? “Consequently, the first call to va_arg will only read the first 4 types of the double (producing a garbage result), ”

shouldn’t that read “first 4 bytes“?

]]> By: Alex http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-59745 Alex Sat, 02 May 2009 04:37:51 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-59745 Yeah, I didn't want to encourage people to try to clone printf(). Yeah, I didn’t want to encourage people to try to clone printf().

]]> By: Ben http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-55321 Ben Thu, 02 Apr 2009 10:16:36 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-55321 I think it might be worth mentioning the ellipses' value in formatted-string functions such as the printf() family. It would be ideal for implementing a date() function similar to that in PHP, for instance, where the number and type of parameters is explicitly defined in the format string. Obviously this is also dangerous (possibly even more so) but it would demonstrate handling mixed-type variable arguments. Of course it might also demonstrate How To Break Your Stack (TM). I think it might be worth mentioning the ellipses’ value in formatted-string functions such as the printf() family.
It would be ideal for implementing a date() function similar to that in PHP, for instance, where the number and type of parameters is explicitly defined in the format string. Obviously this is also dangerous (possibly even more so) but it would demonstrate handling mixed-type variable arguments. Of course it might also demonstrate How To Break Your Stack (TM).

]]> By: Learn C++ - » 15.4 — Uncaught exceptions, catch-all handlers, and exception specifiers http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/comment-page-1/#comment-30974 Learn C++ - » 15.4 — Uncaught exceptions, catch-all handlers, and exception specifiers Sat, 25 Oct 2008 20:07:40 +0000 http://www.learncpp.com/cpp-tutorial/714-ellipses-and-why-to-avoid-them/#comment-30974 [...] it uses the ellipses operator (…) as the type to catch. If you recall from lesson 7.14 on ellipses and why to avoid them, ellipses were previously used to pass arguments of any type to a function. In this context, they [...] [...] it uses the ellipses operator (…) as the type to catch. If you recall from lesson 7.14 on ellipses and why to avoid them, ellipses were previously used to pass arguments of any type to a function. In this context, they [...]

]]>