dev-cpp-users

Re: [Dev-C++] vectors

[Daniel G. <sp...@ho...>]

<html><div style='background-color:'><DIV>
<P>I thought vecotrs were only used with graphics? Can you use them at other times?<BR><BR></P></DIV>
<DIV></DIV>
<DIV></DIV>&gt;From: "Devin Carless" <DCC...@YA...>
<DIV></DIV>&gt;To: <DEV...@LI...>
<DIV></DIV>&gt;Subject: Re: [Dev-C++] 'New Source File' bug 
<DIV></DIV>&gt;Date: Sun, 17 Feb 2002 11:46:47 -0500 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; I currently have little knowledge of the standard library and i am 
<DIV></DIV>&gt; &gt; currrently learning about it (currently reading 16 chapter of TC++PL 
<DIV></DIV>&gt; &gt; Special Edition). But with as many as i know so far you can do many 
<DIV></DIV>&gt; &gt; things with vectors: 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Oh, I know. They're wonderful-looking things. I'm currently only 
<DIV></DIV>&gt;using them as fancy dynamic arrays. 
<DIV></DIV>&gt; But while you can do a lot with vectors, vectors can do a lot with 
<DIV></DIV>&gt;you. I had Vec.size() in a conditional, and the conditional 
<DIV></DIV>&gt;consistently got it wrong. It worked, however, when I replaced 
<DIV></DIV>&gt;Vec.size() with a variable, Size, which had been intialized to 
<DIV></DIV>&gt;Vec.size() a line before. 
<DIV></DIV>&gt; That's only one reason I'm very cautious with vectors. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; Anyway i think it is our lack of knowledge, not vectors. When i finish 
<DIV></DIV>&gt; &gt; the 16th chapter i will resend an email telling you how you can to 
<DIV></DIV>&gt; &gt; assignments using vector constructors. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; There's a saying that goes 'It's a poor workman who blames his tools.' 
<DIV></DIV>&gt;And many times it's been my mistake; I'm a poor workman. But there 
<DIV></DIV>&gt;are other times when I've caught something funny going on. (push_back() 
<DIV></DIV>&gt;refusing to work was one of them.) 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; I am confident that standard containers are better than built in arrays. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Absolutely true: the reason I'm using vectors is because arrays are 
<DIV></DIV>&gt;/worse./ The only thing I think arrays have to recommend them is that 
<DIV></DIV>&gt;they can be intialized like so: 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; char* frogs[4] = { "Green", "Tree", "Bull", "Muppet" }; 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; (Yes, I know char* is frowned upon, but I've found some interesting 
<DIV></DIV>&gt;traps trying to initialize a string to a string constant of the form "Blah" 
<DIV></DIV>&gt;when passed as an argument.) 
<DIV></DIV>&gt; For my project, in which certain subclasses have great tracts of 
<DIV></DIV>&gt;constant data, this kind of initialization would be ideal. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; You can overload an operator as a global function 
<DIV></DIV>&gt; &gt; e.g. 
<DIV></DIV>&gt; &gt; vector<INT> &amp;operator=(vector<INT>&amp;a, const vector<INT> &amp;b) 
<DIV></DIV>&gt; &gt; { ... } 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Thank you :) 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; or better define it as a template: 
<DIV></DIV>&gt; &gt; 
<DIV></DIV>&gt; &gt; template <CLASS T>
<DIV></DIV>&gt; &gt; vector<T> &amp;operator=(vector<T> &amp;a, const vector<T> &amp;b) 
<DIV></DIV>&gt; &gt; { ... } 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Templates I'm somewhat wary of; I'll deal with them when I have 
<DIV></DIV>&gt;to. Until then I'll stick with learning the ins and outs of what I /do/ 
<DIV></DIV>&gt;know. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; Yes, me too. But C++ is 10000% better. I suggest "The C++ Programming 
<DIV></DIV>&gt; &gt; Language" 3rd edition or Special Edition by Bjarne Stroustrup (the 
<DIV></DIV>&gt; &gt; creator of C++). 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; Unfortunately, that's beyond my resources. I don't have the money and the 
<DIV></DIV>&gt;demand in the university/city library for books that teach C++ is total. 
<DIV></DIV>&gt;I've 
<DIV></DIV>&gt;only managed to scrounge the texts I'm working with by good fortune. 
<DIV></DIV>&gt; And despite what I might say, C++ is 10,000% better. Partially, I think, 
<DIV></DIV>&gt;because the old Kernighan and Ritchie paradigm of 'only stupid people make 
<DIV></DIV>&gt;mistakes - are you a stupid person?' has been replaced by the strong-type- 
<DIV></DIV>&gt;checking 'Everyone makes mistakes, we'll help you catch them' theory. 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; &gt; It is better. :) 
<DIV></DIV>&gt; 
<DIV></DIV>&gt;You've said it three times now - it must be true! 
<DIV></DIV>&gt; 
<DIV></DIV>&gt;--Devin Carless 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; 
<DIV></DIV>&gt;_________________________________________________________ 
<DIV></DIV>&gt;Do You Yahoo!? 
<DIV></DIV>&gt;Get your free @yahoo.com address at http://mail.yahoo.com 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; 
<DIV></DIV>&gt;_______________________________________________ 
<DIV></DIV>&gt;Dev-cpp-users mailing list 
<DIV></DIV>&gt;Dev...@li... 
<DIV></DIV>&gt;https://lists.sourceforge.net/lists/listinfo/dev-cpp-users 
<DIV></DIV></div><br clear=all><hr>Join the world’s largest e-mail service with MSN Hotmail. <a href='http://go.msn.com/bql/hmtag4_etl_EN.asp'>Click Here</a><br></html>

RE: [Dev-C++] vectors

[Ioannis V. <no...@ya...>]

Yes.
 
 
Ioannis
 
* Ioannis Vranos
* Programming pages:  <http://www.noicys.d2g.com/>
http://www.noicys.d2g.com
* Alternative URL:  <http://run.to/noicys> http://run.to/noicys

-----Original Message-----
From: Daniel Glenfield [mailto:sp...@ho...] 
Sent: Sunday, February 17, 2002 8:30 PM
To: no...@ya...
Subject: RE: [Dev-C++] vectors



Oh is it now? Thank you very much, I never learnt that on my course.
ANSI C++ standard as well I assume?

Re: [Dev-C++] vectors

[Benjamin W. <ben...@ho...>]

<html><div style='background-color:'><DIV>
<P>Good morning,</P></DIV>
<P>It looks like this has already been answered so I'll make it short, my apologies..but I've been on vacation this past weekend and didn't get a chance to check mail.</P>
<P>Anyway, there are "vectors" as they are known in mathematics and graphical programming techniques and then there are "vectors" as they are known in C++, which are just STL containers used, as Ioannis has already mentioned, to help handle situations where arrays break down and aren't quite efficient enough.&nbsp; They are a very good and useful tool.</P>
<DIV><FONT face="Geneva, Arial, Sans-serif" size=2>Benjamin Wheeless</FONT></DIV>
<DIV></DIV>
<DIV><FONT face="Geneva, Arial, Sans-serif" size=2><STRONG>Network Systems - Delta Airlines, Inc.</STRONG></FONT></DIV>
<DIV></DIV>
<DIV><FONT face=Arial size=2><STRONG>Atlanta, GA - USA 30320</STRONG></FONT></DIV>
<DIV></DIV>
<DIV><FONT face=Arial size=2><STRONG>==============================</STRONG></FONT></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>
<DIV></DIV>----Original Message Follows---- 
<DIV></DIV>From: "Daniel Glenfield" <SP...@HO...>
<DIV></DIV>To: dev...@li... 
<DIV></DIV>Subject: Re: [Dev-C++] vectors 
<DIV></DIV>Date: Sun, 17 Feb 2002 16:49:45 +0000 
<DIV></DIV>
<DIV></DIV></div><br clear=all><hr>Get your FREE download of MSN Explorer at <a href='http://go.msn.com/bql/hmtag_etl_EN.asp'>http://explorer.msn.com</a>.<br></html>

RE: [Dev-C++] vectors

[Ioannis V. <no...@ya...>]

vector is container of the C++ standard library aimed to replace built
in arrays.
 
 
Ioannis
 
* Ioannis Vranos
* Programming pages:  <http://www.noicys.d2g.com/>
http://www.noicys.d2g.com
* Alternative URL:  <http://run.to/noicys> http://run.to/noicys

-----Original Message-----
From: dev...@li...
[mailto:dev...@li...] On Behalf Of Daniel
Glenfield
Sent: Sunday, February 17, 2002 6:50 PM
To: dev...@li...
Subject: Re: [Dev-C++] vectors



I thought vecotrs were only used with graphics? Can you use them at
other times?