g++ and VC

[Nevyn]

Hi, i am developing a xplatform open source project using qt,
and it did not compile out of the box on windows (VC 6.0 no SP) cos of
some C++ 'errors'

e.g.

file.h
class foo
{
..
..
..
void method(int=0);
}

file.cpp
foo::method(int a=0)
{
..
..
..
}

VC complained about re-definition of default parameter, while g++ (2.95.3)
compiled w/ even warnings (-Wall switch was on)

VC also complained for this

{
int i=0;

[Mike Wahler]

Re: g++ and VC


Nevyn <nevynZEROSPAM@ hotmail.com> wrote in message
news:pan.2003.0 8.16.22.28.51.6 62060@hotmail.c om...[color=blue]
> Hi, i am developing a xplatform open source project using qt,
> and it did not compile out of the box on windows (VC 6.0 no SP) cos of
> some C++ 'errors'
>
> e.g.
>
> file.h
> class foo
> {
> .
> .
> .
> void method(int=0);
> }
>
> file.cpp
> foo::method(int a=0)
> {
> .
> .
> .
> }
>
> VC complained about re-definition of default parameter,[/color]
If you write a member function implementation outside
the class body, you should only define the default parameter
in the prototype.
[color=blue]
> while g++ (2.95.3)
> compiled w/ even warnings (-Wall switch was on)
>
> VC also complained for this
>
> {
> int i=0;
> .
> .
> .
> for( int i=0;i<100;i++)
> .
> .
> .
> }
>[/color]

This is a well-known VC++ bug.
[color=blue]
> again, re-definition of variable i
>
> what should i do to avoid these problems? (i am total newbie at VC)[/color]

Use a different name for one of the 'i's,
or create a 'dummy' scope:

int i = 0;
/* etc */
{
for(int i; /* etc */)
/* etc */
}

-Mike

[Rolf Magnus]

Re: g++ and VC

John Harrison wrote:
[color=blue][color=green]
>> what should i do to avoid these problems? (i am total newbie at VC)
>>
>> thanks a lot[/color]
>
> You'll avoid more future problems if you upgrade VC++ to the latest
> service pack.[/color]

I'd advice to do similar with gcc. 2.95.3 is over two years old and
known to have quite some issues with C++ standard compliance. You (the
OP) should update to a recent version like 3.3, or at least 3.1.