From: dontmailme AT iname DOT com (Steamer)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: compare()
Date: Thu, 02 Nov 2000 13:56:29 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

Rodeo Red wrote:

> Now Ive got a similar problem with replace() and I don't know if this is
> the same situation. How do I tell if my function is not supported ?

I'm not sure if there's a better way than simply trying it, or looking in
the header files (c:\djgpp\lang\cxx).

> I'd like to be able to know, because if it is supported, the error is
> probably mine.  

I've downloaded Borland C++ 5.5, so I can always get a second opinion on
the correctness of my code.  DJGPP is very good for C, but C++ is another
matter - although things should change once GCC 3.0 appears and is ported
to DJGPP.  (Borland's compiler is probably buggier than GCC, but its
C++ library is currently more complete.)

> This is based on the example on page 1173 pf c++ Primer by Lippman and
> Lajoie, a reliable text. 

Not so reliable if this is a real example from the book...

> #include <string>
> #include <algorithm>

You should have here:

#include <iostream>
using namespace std;

> int main()
> {
>     string str = "The rain in Spain falls mainly on the plain\n";
>     cout << "string:"<< str;
>     string oldval = "rain";
>     string newval = "sleet";
>     replace (str.begin(), str.end(), oldval, newval) ;

This is incorrect.  The function std::replace() replaces elements,
not sequences of elements.  For example:

    replace(str.begin(), str.end(), 'i', 'j');

This would replace every i in str by a j.

>     cout << "new str:"<< str;
> }