code pow(a,b) function in Visual studio 2010 professional - C / C++ / MFC Discussion Boards

Re: about send and receive msg from gsm modem with 8051 controller

Albert Holguin20-Mar-12 5:09

20-Mar-12 5:09

You have to use whatever API was provided for the modem itself, meaning it's completely implementation dependent. I have noticed GSM modems tend to use the same instruction set[^]. Since it's text based, it can really go over anything, COM port, serial port (COM/USB), ethernet.

sending messages

sarfaraznawaz19-Mar-12 21:17

sarfaraznawaz

19-Mar-12 21:17

i have two to three different class here want to send message from class to another class .

please reply soon
Best Regards
sarfaraz

Re: sending messages

Chandrasekharan P19-Mar-12 22:53

Chandrasekharan P

19-Mar-12 22:53

Show us what you have done. and by adding a line "please reply soon" you may not get what you want. You need to give the proper information,

If you are not sure or dont know how to do something there is a site which can give you some insight. here is the link [^]

Every new day is another chance to change your life.

Re: sending messages

CPallini19-Mar-12 23:39

CPallini

19-Mar-12 23:39

in OOP speech 'sending messages' usually translates to 'calling methods'. Hence your classes might provide public methods for 'sending messages'.
If you meant something else, please let us know (that is: "be more specific!").

Veni, vidi, vici.

Re: sending messages

Albert Holguin20-Mar-12 5:02

Albert Holguin

20-Mar-12 5:02

In MFC speech however, it has a very specific meaning, and this is a C/C++/MFC forum. So just need clarification on what he's done and whether he's using MFC.

Re: sending messages

sarfaraznawaz20-Mar-12 18:57

sarfaraznawaz

20-Mar-12 18:57

thank you all i got it ..

and sorry for the improper information

thanks

Re: sending messages

Albert Holguin20-Mar-12 5:04

Albert Holguin

20-Mar-12 5:04

If you're talking about sending messages within the Windows environment, it's relatively simple given that you've subclassed from the proper MFC classes. You can use a number of them so share a bit of code and we'll let you know what's your best option.

code pow(a,b) function in Visual studio 2010 professional

mrby12319-Mar-12 19:06

mrby123

19-Mar-12 19:06

1>c:\msw_give_out\void_effect_no_input_msw_shotplus_i_format\blast_vib_procdlg.cpp(1908): error C2666: 'pow' : 6 overloads have similar conversions
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(583): could be 'long double pow(long double,int)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(581): or 'long double pow(long double,long double)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(535): or 'float pow(float,int)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(533): or 'float pow(float,float)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(497): or 'double pow(double,int)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(122): or 'double pow(double,double)'
1> while trying to match the argument list '(float, double)'
1>c:\msw_give_out\void_effect_no_input_msw_shotplus_i_format\blast_vib_procdlg.cpp(1909): warning C4244: '=' : conversion from 'double' to 'float', possible loss of data
1>c:\msw_give_out\void_effect_no_input_msw_shotplus_i_format\blast_vib_procdlg.cpp(1923): error C2666: 'pow' : 6 overloads have similar conversions
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(583): could be 'long double pow(long double,int)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(581): or 'long double pow(long double,long double)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(535): or 'float pow(float,int)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(533): or 'float pow(float,float)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(497): or 'double pow(double,int)'
1> c:\program files (x86)\microsoft visual studio 10.0\vc\include\math.h(122): or 'double pow(double,double)'
1> while trying to match the argument list '(float, double)'

How to fix the error?

Thanks

Re: code pow(a,b) function in Visual studio 2010 professional

Jochen Arndt19-Mar-12 22:08

Jochen Arndt

19-Mar-12 22:08

A good help would be if you have posted the line where the error occurs.

However, the error states that you are calling the pow function with the first argument being a float, and the second one being a double. But there is no overload of the pow function for these argument types. You should cast one value to the type of the other:

C++

float f1 = 2.0;
double f2 = 3.0;
// This will fail
//double f3 = pow(f1, f2);
// Use this instead
double f3 = pow(static_cast<double>(f1), f2);

A general note:
If you did not need the float type for a specific reason (usually memory), you should consider to always use double.

Re: code pow(a,b) function in Visual studio 2010 professional

mrby12320-Mar-12 10:03

mrby123

20-Mar-12 10:03

Thank you for your helpful correction. If I change all 'float' type to double, my program would be too large.

How about change all types to 'float' ?

Thanks

Re: code pow(a,b) function in Visual studio 2010 professional

Jochen Arndt20-Mar-12 21:59

Jochen Arndt

20-Mar-12 21:59

Changing all float to double in a program would not increase the size too much. Only the size of static and initialized floating point values is doubled. During runtime, the size of dynamically allocated values (arrays) is doubled.

You may use float if you are sure that the precision is sufficient. This depends on the operations performed and the required accuracy.

I added the note to better use double because you are using the pow() function. If you add the return value to other values like in polynomial functions, there may be inexact results when using float.

Re: code pow(a,b) function in Visual studio 2010 professional

mrby12321-Mar-12 18:46

mrby123

21-Mar-12 18:46

thank you, really helped me.

Why click and nothing done ?

doanhanam19-Mar-12 18:46

doanhanam

19-Mar-12 18:46

i have IDD_mainmenu as default created by VS2010 . When I click a File in mainmenu with handle click and call another Dialog . It is alright . But when I create a button and create class for that dialog to handle click button event . When I click , no thing happen ! . I have try and Ask many but rare people know

http://www.mediafire.com/?2gwt06lg3sd794m

When run , click on HERE and then Button1 . After click no thing happen even when program handler event to show the message .
I test and find no error but it does not do .

Thank you .

hi world

Re: Why click and nothing done ?

enhzflep19-Mar-12 20:43

enhzflep

19-Mar-12 20:43

Step 1. Cut lines 154 - 177 (inc) from 2.cpp
Step 2. Paste to bottom of 2.h
Step 3. Copy lines 175 and 176 from 2.cpp
Step 4. Replace lines 134 and 135 in 2View.cpp with the text copied in step 3

In a nutshell:
When the Help->About menu option was selected, a variable of type CAboutDlg was instanced and then had the DoModal member function called.
However, when the Here->1.1 menu option was selected, you were loading a CDialog with the appearance of the About dialog - that is to say, the resource was not hooked up to a class object of the correct type, so it could not fire the handler for the Button1 button.

Step 1&2: Move class definition for CAboutDlg to 2.h
Step 3&4: Instance correct object (CAboutDlg, not CDialog)

Re: Why click and nothing done ?

doanhanam20-Mar-12 1:33

doanhanam

20-Mar-12 1:33

Hi I have done like you had showed .
http://www.mediafire.com/?tra9l1xoh04qwah[^]

And still nothing done ! .
Thank you
Can you show me basically the way to make it work ? . Thank you a lot . Have nice day .

hi world

Re: Why click and nothing done ?

enhzflep20-Mar-12 1:47

enhzflep

20-Mar-12 1:47

Not quite there yet...

You didn't replace the code for CMyView::OnHere1

Copy the code from CMy2App::OnAppAbout and replace the code for CMyView::OnHere1 with it.

Re: Why click and nothing done ?

doanhanam20-Mar-12 14:32

doanhanam

20-Mar-12 14:32

http://www.codeproject.com/Messages/4196771/Error-in-add-event-handler.aspx[^]

it is simpler and we can see it clearly.

hi world

why the coded game is not show

rucha warade19-Mar-12 4:35

rucha warade

19-Mar-12 4:35

why the code of game is not show

Re: why the coded game is not show

Richard MacCutchan19-Mar-12 4:40

Richard MacCutchan

19-Mar-12 4:40

rucha warade wrote:
why the code of game is not show

What does this mean; please explain your problem clearly?

[edit]As this is your first question on this site, I suggest you read HOW-TO-ASK-A-QUESTION[^].
[/edit]

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: why the coded game is not show

Richard Andrew x6419-Mar-12 17:12

Richard Andrew x64

19-Mar-12 17:12

The difficult we do right away...
...the impossible takes slightly longer.

Re: why the coded game is not show

Rajesh R Subramanian19-Mar-12 18:44

Rajesh R Subramanian

19-Mar-12 18:44

You've lost the game[^].

"Real men drive manual transmission" - Rajesh.

Re: why the coded game is not show

CPallini19-Mar-12 23:43

CPallini

19-Mar-12 23:43

Mystical Superpowers, I believe.
It is the same magic we should use to guess your scenario, I suppose.

Veni, vidi, vici.

CLabelControl problem

manju 319-Mar-12 1:55

manju 3

19-Mar-12 1:55

Hi all,
Cant we hide a CLabelControl after declaring a variable..???
I am getting a run time error for this.

Test.h
CLabelControl	m_Test;

Test.cpp
DDX_Control(pDX, IDC_LABEL_TEST, m_Test);


BOOL CExampleDlg::OnInitDialog() 
{
	CLabelControl* lTest;
	lTest=(CLabelControl*)GetDlgItem(IDC_LABEL_TEST);
	lTest->ShowWindow(SW_HIDE);
	return true;
}

SQL

If i comment
//CLabelControl m_Test;                   in Test.h
//DDX_Control(pDX, IDC_LABEL_TEST, m_Test);  in  Test.pp

Then it runs without any error.

Can anyone have any idea

Thanks in Advance
Sharan

Re: CLabelControl problem

krmed19-Mar-12 2:27

krmed

19-Mar-12 2:27

Your label control does not exist at the point you are trying to hide it.

You need to call CDialog::OnInitDialog in your OnInitDialog method before the control exists.

C++

BOOL CExampleDlg::OnInitDialog() 
{
	CDialog::OnInitDialog();
	CLabelControl* lTest;
	lTest=(CLabelControl*)GetDlgItem(IDC_LABEL_TEST);
	lTest->ShowWindow(SW_HIDE);
	return true;
}

Hope that helps.

Karl - WK5M
PP-ASEL-IA (N43CS)
PGP Key: 0xDB02E193
PGP Key Fingerprint: 8F06 5A2E 2735 892B 821C 871A 0411 94EA DB02 E193

help me about A* algorithm

Member 874065018-Mar-12 21:18

Member 8740650

18-Mar-12 21:18

Dear all,
can any one provide me the "C source code for A* algorithm"

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