C / C++ / MFC

Re: what is equivalent of printf("%02d:%02d", minutes, seconds) with std::ostringstream?

19-May-08 4:47

ostringstream ostr;
ostr.fill('0');
ostr.width(2);
ostr << 5 << ":";
ostr.width(2);
ostr << 2 << endl;

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

sashoalm19-May-08 5:30

sashoalm

19-May-08 5:30

Thanks, it worked perfectly.

btw, it seems an awkward construction, with printf the formatting is more natural. guess the new c++ classes can't be better at everything...

Re: what is equivalent of printf("%02d:%02d", minutes, seconds) with std::ostringstream?

toxcct19-May-08 5:35

Re: what is equivalent of printf("%02d:%02d", minutes, seconds) with std::ostringstream?

19-May-08 5:35

all the lines explained by CPallini can be "inlined" into once (if i remember well)...

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CPallini19-May-08 5:55

Re: what is equivalent of printf("%02d:%02d", minutes, seconds) with std::ostringstream? (modified)

19-May-08 5:55

Yes, it can be done, including <iomanip> and slightly changing the syntax:

#include <iomainip>
//...
str.fill('0');
str << setw(2) << 2 << ":" << setw(2)  << 5 << endl;

CPallini19-May-08 5:53

Re: what is equivalent of printf("%02d:%02d", minutes, seconds) with std::ostringstream? (modified)

19-May-08 5:53

sashoalm wrote:
it seems an awkward construction

I agree, that's why I tend to use printf family functions. On the other hand manipulator syntax is great for dealing with complex objects.

[added]
BTW, thanks to toxcct suggestion, have a look at
http://www.codeproject.com/script/Forums/View.aspx?fid=1647&msg=2559997[^]
[/added]

Smile | :)

toxcct19-May-08 6:00

create an Event to a TreeView

19-May-08 6:00

also, you (and the OP) must be aware that printf()-like functions are not thread safe, were C++ xxstream classes are.

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sabeeshcs19-May-08 2:41

sabeeshcs

19-May-08 2:41

Hello,
I have a class in MFC and I want to use this class in Windows forms. For that I create a .dll file using the MFC class and load that .dll file in to CLR project and draw that object in Windows form. But now I want to add an event to that new control. How can I do this?
eg:
I have a ctreeview in MFC and I create a .dll file using that MFC class and open a CLR project in VC++2008 and add a form to that project and load that .dll file. Then I can access that MFC class in my new Windows form ( in CLR project ). and it is working. But my current problem is that, I want to read selected node value from that tree node to my Windows forms's text entry. How can I do this? I think, for that we need to add an event ( After select ) to that control. But that control is loaded from .dll file.
How can I solve this problem?
Please help me.

Cross Post

led mike19-May-08 4:26

led mike

19-May-08 4:26

Don't cross post

led mike

Help clarify "this" pointer with dialog boxes

Kwanalouie19-May-08 1:59

Kwanalouie

19-May-08 1:59

Using Visual C++ 6.0 MFC in SDI application

I typically get confused with the "this" pointer. For example, I created a Dialog Box using Visual C++ 6.0 MFC. Its class has its own .cpp and .h files (Class name for this dialog box is CMyCustomDlg). In the book "Using Visual C++ 6" by Jon Bates and Tim Tompkins on page 219 they talk about Displaying a Modal Dialog Box. They say to declare a dialog class object local to the function handler, such as

CMyCustomDlg dlgMyCustom(this);
//and then display it using
int nRetCode = dlgMyCustom.DoModal();

where CMyCustomDlg is the class name given to this dialog class. I don't understand what is happening here with the "this" pointer with this type of syntax and what the (this) in parenthesis means, and I don't understand where I can use

CMyCustomDlg dlgMyCustom;
int nRetCode = dlgMyCustom.DoModal();
without putting the "this" in parenthesis in the object declaration.
Thanks ahead of time.

Re: Help clarify "this" pointer with dialog boxes

toxcct19-May-08 2:12

Re: Help clarify "this" pointer with dialog boxes

19-May-08 2:12

the this in parenthesis is the pointer of the current instance (the meaning of this) passed as a parameter to the CMyCustomDlg class constructor.

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_AnsHUMAN_ 19-May-08 2:14

_AnsHUMAN_

19-May-08 2:14

A pointer to the parent or window owner object that is being passed to the constructor of the dialog. If it is NULL [default value], the dialog objects parent window is set to the main application window.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

How can i get the summary property of docx file

Prazwol19-May-08 1:32

Prazwol

19-May-08 1:32

I use following code but can't get the property of docx file

hr = ::StgOpenStorageEx(wcFilename, STGM_READ | STGM_SHARE_EXCLUSIVE, STGFMT_ANY,
                0, NULL, 0, IID_IPropertySetStorage, (void**)&pPropSetStg);
// hr return as S_OK

hr = pPropSetStg->Open(FMTID_SummaryInformation,
                       STGM_READ | STGM_SHARE_EXCLUSIVE, &pPropStg);
// hr return as S_OK

//After getting int nPidsi, PROPSPEC *pPropSpec, PROPVARIANT *pPropVar

hr = pPropStg->ReadMultiple(nPidsi, pPropSpec, pPropVar);
// hr return as S_FALSE

Re: How can i get the summary property of docx file

David Crow19-May-08 3:50

David Crow

19-May-08 3:50

Member 4354119 wrote:
I use following code but can't get the property of docx file

So what's failing?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

initialization problem

Dennis L19-May-08 0:16

Dennis L

19-May-08 0:16

Hi all!

I have a problem when i initialize class members.

The class is:

class NAME
{
private:
int a;
int b;
BYTE bs1[480];
BYTE bs2[480];

public:
// FUNCTIONS

NAME();
~NAME();
}

in CPP file:

NAME::NAME():a(0),b(0)
{
memset(bs1, "", sizeof(BYTE)*480) // This run well when debugging
memset(bs2, "", sizeof(BYTE)*480) // Here crashes???
}

Can anyone tell me why it crashes in the second memset?

Thanks!

Re: initialization problem

toxcct19-May-08 0:27

Re: initialization problem

19-May-08 0:27

memset(bs2, "", sizeof(BYTE)*480)

why "" ?

just change to this :
memset(bs2, 0, sizeof(BYTE)*480)

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CPallini19-May-08 0:30

Re: initialization problem

19-May-08 0:30

Dennis L wrote:
memset(bs1, "", sizeof(BYTE)*480) // This run well when debugging
memset(bs2, "", sizeof(BYTE)*480) // Here crashes???

should be

memset(bs1, '\0', sizeof(bs1));
memset(bs2, '\0', sizeof(bs2));

BTW, possibly you should use some symbolic name for the buffer size, for instance

class NAME
{
private:
static const int SIZE = 480;
BYTE bs1[SIZE];
BYTE bs2[SIZE];
//..
}

Dennis L19-May-08 0:36

Dennis L

19-May-08 0:36

Thanks for your reply! I'll check it

Asyncronous connection using wininet.

ShilpiP18-May-08 23:50

ShilpiP

18-May-08 23:50

Is there any code for asyncronous connection using wininet except the two 1)[^]2)[^]??
Frown | :(

or any reference so that i implement the same

Thanks in advance Smile | :)

Yes U Can ...If U Can ,Dream it , U can do it ...ICAN

Read from command prompt

Kiran Pinjala18-May-08 23:43

Kiran Pinjala

18-May-08 23:43

I want toread the text, result of a command at the command prompt. Is there a way other than redirecting it to a text file. My command shows some timely status on the window.
Thank you.

Saadhinchaali

toxcct18-May-08 23:46

18-May-08 23:46

use std::cin class to read from the input stream

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Kiran Pinjala19-May-08 0:33

Kiran Pinjala

19-May-08 0:33

toxcct wrote:
std::cin

Thank you but I dont think it will help. Ok i will explain the total case.

I have a batch file which contains a call to an exe file called "checkstat.exe". By executing this exe through that batch file, a console window comes, and the result of 10 lines is shown on the console at first. Late after 3-4 seconds again 4 lines are shown on the console. With some intervals of 3-4 seconds some lines are shown like that until we press ctrl+c. I am running the batch file from my application using

system("");

I want all the lines which are shown on the console until the ctrl+c into some buffer in my application.

Thank you

Saadhinchaali

Rajkumar R19-May-08 0:39

Rajkumar R

19-May-08 0:39

[How to spawn console processes with redirected standard handles^] may be useful.