C / C++ / MFC

Re: Member function pointer

14-Apr-08 1:22

You cannot do that.
Declare your function as static, for instance:

class MyClass{
static double Equation(double x){ return x*x;}
//..
};
//..
result = EquationSolver(x1,x2, Equation);

BTW (this->*ptr)(x) is a function call.

Smile | :)

If the Lord God Almighty had consulted me before embarking upon the Creation, I would have recommended something simpler.
-- Alfonso the Wise, 13th Century King of Castile.

This is going on my arrogant assumptions. You may have a superb reason why I'm completely wrong.
-- Iain Clarke

Rajkumar R14-Apr-08 1:31

Re: Member function pointer

14-Apr-08 1:31

johanlich wrote:
result = EquationSolver(x1,x2,(this->*ptr)(x)); // <- Error here

this "(this->*ptr)(x)" actually calling the member function and not just passing the function pointer as you expect.

johanlich wrote:
// function in another solution
double EquationSolver(double x1,double x2, double (*func)(double));

func is a not a type of class member function, you cannot pass non-static class member function pointer to this function.

if you want to call a pointer to member function you need the class object, so you may pass both the object and pointer to member function like,
double EquationSolver(double x1,double x2, MyClass *pObj, double (MyClass::*func)(double));

or if you use a static member function. like

class MyClass{

private:
...
static double Equation(double x);

then use like this,
result = EquationSolver(x1,x2,this->Equation);

johanlich14-Apr-08 3:25

johanlich

14-Apr-08 3:25

Thanks for your input. The static idea worked great, until I needed to call functions from within my Equation-function.
In the end we decided that it became too complex to use member function pointers, we will redesign the math library.
But I appreciate the help.

// Johan

How I know when the "lineMakeCall" function finish

yytg14-Apr-08 0:24

yytg

14-Apr-08 0:24

I set the messages callback as so

<br />
lineSetStatusMessages(m_hLine,lpDevCaps->dwLineStates,0);<br />

But I don't get the message "LINECALLSTATE_RINGBACK"
It's possible so the device don't support this message?
Or how do I say to the system to send this message
Or maybe I need to take this message "LINECALLSTATE_PROCEEDING"

Thanks in advance

Win CE 5.0: Is it posible to send SMSes via the RAS-Phone API?

Klive813-Apr-08 23:20

Klive8

13-Apr-08 23:20

Is it posible to send SMSes via the RAS-Phone API? Platform: Windows CE 5.0

http://msdn2.microsoft.com/en-us/library/ms897066.aspx

[Message Deleted]

nisha0000013-Apr-08 23:06

nisha00000

13-Apr-08 23:06

[Message Deleted]

Rajesh R Subramanian13-Apr-08 23:14

Rajesh R Subramanian

13-Apr-08 23:14

9.39624

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Mukesh Kumar13-Apr-08 23:26

Mukesh Kumar

13-Apr-08 23:26

nisha00000 wrote:
this is very important question ..to all

nisha00000 wrote:
it's very urgent for us!!

How this is important to all? who is us?.... you??? Confused | :confused:

Mukesh Kumar
Software Engineer

ThatsAlok19-Jun-09 1:23

ThatsAlok

19-Jun-09 1:23

Mukesh_VC wrote:
How this is important to all? who is us?.... you???

offcourse

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow
Never mind - my own stupidity is the source of every "problem" - Mixture

cheers,
Alok Gupta
VC Forum Q&A :- I/IV
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CPallini14-Apr-08 0:17

14-Apr-08 0:17

Yes, here are some C++ /VC++ openings. Roll eyes | :rolleyes:

vijay_aroli14-Apr-08 1:13

vijay_aroli

14-Apr-08 1:13

What are you expecting from us by asking this here? Mad | :mad:

I have been reading your posts today here on this forum. What do you think you are? Your replies to few of the questions here today are far from being a solution to what was actually asked. Don't you realize that you are downgrading the quality of the forum with your posts?

Don't ask anything like what you had posted here in this thread here. And moreover, don't post anything as solutions/suggestions when you are not sure about it. Leave that job to the experts here.

Regards,
Vijay.

Rajkumar R14-Apr-08 1:57

14-Apr-08 1:57

nisha00000 wrote:
Is there any openings in C++/VC++
if you know the answer, please replay ...

in C++/VC++ blocks opens with opening brace, you need to close it with closing brace otherwise you end with compilation errors Smile | :)

Rajesh R Subramanian14-Apr-08 2:01

Rajesh R Subramanian

14-Apr-08 2:01

Stop being facetious. That was an urgent query FYI.

Laugh | :laugh:

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Rajkumar R14-Apr-08 2:05

14-Apr-08 2:05

Rajesh R Subramanian wrote:
That was an urgent query FYI.

Sorry that i couldn't reply before OP delete the message.
Big Grin | :-D

nisha0000014-Apr-08 2:57

nisha00000

14-Apr-08 2:57

thanks guys ....i these r all the best answers for ever ...its just guess but its correct..

By
Nisha

Hamid_RT14-Apr-08 21:09

Hamid_RT

14-Apr-08 21:09

Its not good that you delete your qeustion.

__timeb64 function

rp_suman13-Apr-08 22:59

rp_suman

13-Apr-08 22:59

I want to print the system time with format:
"HH:MM:SS:FFF" where "FFF" is millisecond.

How to format like above using _ftime64() function?

Thanks,
Suman

--
"Programming is an art that fights back!"

Re: __timeb64 function

CPallini14-Apr-08 0:13

14-Apr-08 0:13

If you really need the milliseconds field then you should consider a function like timeGetTime [^], however it gives you just the system time.
Smile | :)

Re: __timeb64 function

Rajkumar R14-Apr-08 1:49

Re: Writing Carray to a file

14-Apr-08 1:49

rp_suman wrote:
"HH:MM:SS:FFF" where "FFF" is millisecond.

How to format like above using _ftime64() function?

See this sample code for _ftime [^]

I modified single line of code as,

printf( "The time is %.8s:%hu", &timeline[11], timebuffer.millitm);

if you want in a buffer try any formatting API that writes to buffer like wsprintf().

Re: __timeb64 function

rp_suman14-Apr-08 2:12

rp_suman

14-Apr-08 2:12

Thanks a lot for the help from you all!!

Best Regards,
Suman

--
"Programming is an art that fights back!"

Writing Carray to a file

krishnan.s13-Apr-08 22:50

krishnan.s

13-Apr-08 22:50

Hi,
I have a structure with a CArray, Is it possible to write and read the stucture as a whole using ReadFile() and WriteFile() functions.

CPallini14-Apr-08 0:29