Gnu C++ stream.h char* form(const char*, ...)

by Edwin Tisda » Fri, 22 Apr 1994 15:33:24

I just installed the latest version of the slackware distribution
with version 2.5.8 of the Gnu C++ compiler, `g++', and version 2.5.3
of the Gnu C++ library, `libg++'. I discovered the following problem:

unix% cat test.C
#include <stream.h>

int main(int argc, char** argv) {
cout << form("something\t")
<< form("and something else\n");
cout << "end of test\n";
}

unix% g++ test.C
unix% a.out
something something end of test
unix%

We have the same versions on our Sun 4 computers which produce
the correct output:

something and something else
end of test

Could someone please tell me how to fix or work around this problem?

Top

1. C++: const int and const char* members in classes

Hi everybody!

Maybe someone can give me help on this problem?
Im just writing a class which needs a number of constant numbers and
strings. So I naivley started off like this:

header:
class foo
{
const unsigned int a_number=7;
const unsigned char a_string[] =
{0x00,0x00,0x00,0x00,0x00,0x00,0x00};
public:
a_function(const unsigned int &, const unsigned char* );
b_function();

code:
...
b_function()
{ ...
a_function(a_number,a_string);
...}

this is fine for the compiler (g++) but produces a linker error
(undefined ref. to a_number, a_string).
Strange to me is that when I use

b_function()
{ ...
unsigned int b_number=a_number;
a_function(b_number,a_string);
...}

theres no error thrown for a_number but the trick doesnt work for the
const char*. I tried to move the definition into the constructor
foo::foo():a_string={...} , ... {
and chaught some compiler errors, so what is the way its meant to be?
The only workaround I can think of is using static members (didnt try
yet) but shouldnt there be another way?

Thanks in advance for any help / hints!
Eckardt

eckardt _at_ asta.rwth-aachen.de

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