C / C++ / MFC

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

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

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

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

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

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

Why click and nothing done ?

21-Mar-12 18:46

thank you, really helped me.

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

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)

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

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.

why the coded game is not show

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

rucha warade19-Mar-12 4:35

rucha warade

19-Mar-12 4:35

why the code of 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

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.

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: CLabelControl problem

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

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"

Re: help me about A* algorithm

«_Superman_»18-Mar-12 21:48

«_Superman_»

18-Mar-12 21:48

http://en.wikipedia.org/wiki/A*_search_algorithm[^]

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

Polymorphism in C

Read the text file from another PC(server PC)

D.Manivelan18-Mar-12 20:44

D.Manivelan

18-Mar-12 20:44

Dear Friend,

From my PC, I have to read the text file from another PC(server PC).

After that i have to invoke one "EXE" (application) present in that same PC(Server PC).

Then i have to send the information what i have read from that file to this application.

Kindly help me.

Re: Read the text file from another PC(server PC)

Richard MacCutchan18-Mar-12 22:40

Richard MacCutchan

18-Mar-12 22:40

Are both PCs on the same network and able to share disks? If so you can just read the file and execute the program from the server's shared disk.

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

How to extract plain text from html file?

Le@rner18-Mar-12 20:31

Le@rner

18-Mar-12 20:31

hi all,

can anybody help me to extract plain text from html file?

thanks.

Re: How to extract plain text from html file?

Jochen Arndt18-Mar-12 22:35

Jochen Arndt

18-Mar-12 22:35

A very simple parser would:

Get the used character set from the header
Locate the next < char, locate the next > char behind, and delete all in between.
Replace the HTML entities &, <, >, and " by the corresponding chars &, < >, and ".
Optional replace other entities by the corresponding characters according to the used character set.
Optional replace Unicode code points (&#[x]cp;) by the corresponding characters according to the used character set.
Optional convert the resulting text to the required output character set

migration from c++ 6 to Visual stutio professional 2010

mrby12318-Mar-12 18:53