From: "Orn E. Hansen" <oe.hansen@oehansen.pp.se>
To: Alexandre Oliva <oliva@dcc.unicamp.br>
Cc: "Orn E. Hansen" <oe.hansen@oehansen.pp.se>, egcs@cygnus.com
Subject: Re: Strings and Integers?
Date: Mon, 01 Dec 1997 03:36:00 -0000 [thread overview]
Message-ID: <199712011133.MAA10187@oehansen.pp.se> (raw)
In-Reply-To: <org1oeuil7.fsf@grupiara.dcc.unicamp.br>
Alexandre Oliva writes:
> Orn E Hansen writes:
>
> > I noticed that there is no implementation of String class.
>
> String is part of libg++, that is not included in egcs. egcs does
> include libstdc++, that provides a definition of class string in the
> header file <string>, not <string.h>, that is a C header-file.
>
> There's no equivalent of libg++'s class Integer in the C++ standard
> library.
>
Since we're at it.
I find <string> close to unusable :-) The reason, is that it appears
implemented as "pascal strings"... an example, running the trailing
program will result in this display:
Enter? 4000
Enter? 300
Enter? 50,35
Enter? 0
=> 4000,00 (4:4000sr/share/i18()
=> 300,00 (3:300)
=> 50,35 (5:50,35)
You'll have to explicidly add '\0' to correct this, in the line...
str = (*ptr) + '\0';
While gnu 'String' is implemented, including the extra '\0', the
absence of it, makes defining your own almost preferrable to using
it. I am assuming that this is a "normal" behaviour? as trying it
on libg++ results in the precise same result...
----- program ----
#include <iostream.h>
#include <string>
#include <list.h>
extern "C" {
#include <stdlib.h>
#include <locale.h>
};
main()
{
list<string> lstr;
list<string>::iterator ptr;
string str;
double v;
setlocale(LC_ALL, "");
do {
cout << "Enter? ";
cout.flush();
cin >> str;
v = strtod(str.data(), NULL);
if (v != 0.0)
lstr.push_back(str);
} while (v != 0.0);
for (ptr = lstr.begin();ptr != lstr.end();ptr++) {
str = (*ptr);
v = strtod(str.data(), NULL);
cout.form(" => %8.2f (%d:%s)", v, str.length(), str.data()) << endl;
};
}
next prev parent reply other threads:[~1997-12-01 3:36 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
1997-11-30 6:03 Orn E. Hansen
1997-11-30 14:29 ` Alexandre Oliva
1997-12-01 3:36 ` Orn E. Hansen [this message]
1997-12-01 5:31 ` David McWherter
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