From: "Wes Kurdziolek" <wesk AT widomaker DOT com>
Newsgroups: comp.os.msdos.djgpp
References: <370982e5 DOT 13785014 AT news DOT wanadoo DOT fr>
Subject: Re: Help with C++ library
Date: Wed, 7 Apr 1999 00:20:34 -0400
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

The reason that you're getting errors in comilation is b/c everything in the
C++ standard library is packaged into the std namespace. You're program
needs to be written like this:

#include <iostream>
#include <string>

using namespace std;    // I'm not sure if G++ for DJGPP supports this
                                          // Otherwise you'll have to prefix
all of your
                                          // standard library references w/
std::
int main()
{
    string str0 = "Hello, ";
    string str1 = "boys!";

    cout << str0 + str1 << endl;

    return 0;
}

Wes

Gallicus <Gallicus AT caramail DOT com> wrote in message
news:370982e5 DOT 13785014 AT news DOT wanadoo DOT fr...
> I use the last version of Djgpp.
> C programs works OK.
>
> I am testing the C++ library.
>
> To test the C++ I wrote :
> #include <iostream.h>
> int main() {
>   int a = 100, b=200;
>   cout << "Hello " << a + b << endl;
>   return 0;
> }
> It works OK.
>
> To test the  String C++ class I wrote:
> #include <iostream>
> #include <_String.h>
> int main() {
>   String str = "Hello ";
>   String str1 = "boys!";
>   cout << str + str1 << endl;
>   return 0;
> }
> Compiling is OK. Linking aborts.
> I get : undefined reference to "String:: ...."
>
> To test the C++ Integer class I wrote :
> #include <Integer.h>
> int main() {
>   Integer a = 100;
>   Integer b = 200;
>   cout << a + b << endl;
>   return 0;
> }
> Compiling is OK. linking aborts.
> I get undefined reference to "Integer::..."
>
> What is the problem ?
>
> TIA.
> Gallicus.