Yes, it's Xmas and I'm working...

Got a problem (of course).
*****

class CPlatform
{
private:
CActuator actuator0(0);

public:
...
};

CActuator actuator0(0);

I get errors when I try to construct a class variable with a parameter inside
CPlatform, but no error when I do the same just underneath it (global variable).

What's going on?

thanks
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org

Hi,

You can't do it that way, you have to do it when constructing the class:

CPlatform::CPlatform():
actuator0(0)
{

}

--


Regards, Ron AF Greve

http://moonlit.xs4all.nl

"Dirk Bruere at Neopax" <dirk.bruere@gmail.com> wrote in message
news:413aupF1d50jmU1@individual.net...[color=blue]
> Yes, it's Xmas and I'm working...
>
> Got a problem (of course).
> *****
>
> class CPlatform
> {
> private:
> CActuator actuator0(0);
>
> public:
> ... };
>
> CActuator actuator0(0);
>
> I get errors when I try to construct a class variable with a parameter
> inside CPlatform, but no error when I do the same just underneath it
> (global variable).
>
> What's going on?
>
> thanks
> Dirk
>
> The Consensus:-
> The political party for the new millenium
> http://www.theconsensus.org[/color]

Dirk Bruere at Neopax wrote:[color=blue]
> Yes, it's Xmas and I'm working...[/color]

It's not Xmas yet.
[color=blue]
> Got a problem (of course).
> *****
>
> class CPlatform
> {
> private:
> CActuator actuator0(0);[/color]

This is an attempt to initialise a non-static member where there can be no
initialiser. Read about initialising members properly.
[color=blue]
> public:
> ...
> };
>
> CActuator actuator0(0);
>
> I get errors when I try to construct a class variable with a parameter
> inside CPlatform, but no error when I do the same just underneath it
> (global variable).
>
> What's going on?[/color]

Nothing. Learn C++. Read about constructors and initialiser lists.

V

Moonlit wrote:
[color=blue]
> Hi,
>
> You can't do it that way, you have to do it when constructing the class:
>
> CPlatform::CPlatform():
> actuator0(0)
> {
>
> }
>[/color]

In that case it might be more transparent to use the default constructor:

class CPlatform
{
private:
CActuator actuator0;

public:
CPlatform(){actuator0.SetNumber(0);}
};

Any problems doing it this way?

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org

Victor Bazarov wrote:
[color=blue]
> Dirk Bruere at Neopax wrote:
>[color=green]
>> Yes, it's Xmas and I'm working...[/color]
>
>
> It's not Xmas yet.
>[color=green]
>> Got a problem (of course).
>> *****
>>
>> class CPlatform
>> {
>> private:
>> CActuator actuator0(0);[/color]
>
>
> This is an attempt to initialise a non-static member where there can be
> no initialiser. Read about initialising members properly.
>[color=green]
>> public:
>> ... };
>>
>> CActuator actuator0(0);
>>
>> I get errors when I try to construct a class variable with a parameter
>> inside CPlatform, but no error when I do the same just underneath it
>> (global variable).
>>
>> What's going on?[/color]
>
>
> Nothing. Learn C++. Read about constructors and initialiser lists.[/color]

Well, I have a lot of things to do.
Since I'm the tech guy in a startup company specialising in new VR tech I have
to be a Jack of All Trades. I'm doing the vision system (optics), motion control
(h/w electronic design and realtime s/w, plus mech), and audio DSP programming.
When we can afford a C++ coding monkey we'll get one.

Meanwhile, I'll ask around if I get a non-obvious (to me) problem.
Thanks.

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org

Dirk Bruere at Neopax wrote:[color=blue]
> [..]
> Well, I have a lot of things to do.
> [..] When we can afford a C++ coding monkey we'll get
> one.
>
> Meanwhile, I'll ask around if I get a non-obvious (to me) problem.[/color]

Well, since you put it so nicely, I can only tell you to go have
a good holiday season. Best wishes from a C++ coding monkey.

Victor Bazarov wrote:
[color=blue]
> Dirk Bruere at Neopax wrote:
>[color=green]
>> [..]
>> Well, I have a lot of things to do.
>> [..] When we can afford a C++ coding monkey we'll get
>> one.
>>
>> Meanwhile, I'll ask around if I get a non-obvious (to me) problem.[/color]
>
>
> Well, since you put it so nicely, I can only tell you to go have
> a good holiday season. Best wishes from a C++ coding monkey.[/color]

And a merry Yuletime to you too:-)

--
Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org

On Fri, 23 Dec 2005 22:10:35 +0000, Dirk Bruere at Neopax wrote:
[color=blue]
> Yes, it's Xmas and I'm working...
>
> Got a problem (of course).
> *****
>
> class CPlatform
> {
> private:
> CActuator actuator0(0);
>
> public:
> ...
> };
>
> CActuator actuator0(0);
>
> I get errors when I try to construct a class variable with a parameter inside
> CPlatform, but no error when I do the same just underneath it (global variable).
>
> What's going on?
>
> thanks
> Dirk
>
> The Consensus:-
> The political party for the new millenium
> http://www.theconsensus.org[/color]


You can't initialize non static non-integer members inside the class
definition.

Your actuator is not static, so you should initialize it in the CPlatform
constructor:

CPlatform::CPlatform() : actuator0(0)
{
// more stuff in the constructor.
}

Hi,

Should work too, still I think mine is better ;-). Well there is less to
type and it might be more obvious for othere C++ developers. If you also
maintain the actutator class you might consider making the 0 the default
value for the constructor

class CAcutator
{
private:
unsigned long Number;
public:
CActuator( unsigned long Number = 0 ):
Number( Number )
{
}

Or something similar. Then you can forget about everything in the CPlatform
class



--


Regards, Ron AF Greve

http://moonlit.xs4all.nl

"Dirk Bruere at Neopax" <dirk.bruere@gmail.com> wrote in message
news:413eigF1d1mtfU1@individual.net...[color=blue]
> Moonlit wrote:
>[color=green]
>> Hi,
>>
>> You can't do it that way, you have to do it when constructing the class:
>>
>> CPlatform::CPlatform():
>> actuator0(0)
>> {
>>
>> }
>>[/color]
>
> In that case it might be more transparent to use the default constructor:
>
> class CPlatform
> {
> private:
> CActuator actuator0;
>
> public:
> CPlatform(){actuator0.SetNumber(0);}
> };
>
> Any problems doing it this way?
>
> --
> Dirk
>
> The Consensus:-
> The political party for the new millenium
> http://www.theconsensus.org[/color]

Amadeus W. M. wrote:
[color=blue]
> On Fri, 23 Dec 2005 22:10:35 +0000, Dirk Bruere at Neopax wrote:
>
>[color=green]
>>Yes, it's Xmas and I'm working...
>>
>>Got a problem (of course).
>>*****
>>
>>class CPlatform
>>{
>>private:
>> CActuator actuator0(0);
>>
>>public:
>> ...
>>};
>>
>> CActuator actuator0(0);
>>
>>I get errors when I try to construct a class variable with a parameter inside
>>CPlatform, but no error when I do the same just underneath it (global variable).
>>
>>What's going on?
>>
>>thanks
>>Dirk
>>
>>The Consensus:-
>>The political party for the new millenium
>>http://www.theconsensus.org[/color]
>
>
>
> You can't initialize non static non-integer members inside the class
> definition.
>
> Your actuator is not static, so you should initialize it in the CPlatform
> constructor:
>
> CPlatform::CPlatform() : actuator0(0)
> {
> // more stuff in the constructor.
> }[/color]

Thanks.
Amadeus your real name?
Pretty good if so...


Dirk

The Consensus:-
The political party for the new millenium
http://www.theconsensus.org