Re: decimal numbers conversion - C / C++ / MFC Discussion Boards

nagamohan_p8-May-06 20:26

8-May-06 20:26

hi
Thanq very much for ur prompt response and i'm thankful very much for ur kind suggestion...David what u suggest is helpful, but the following APIs r useful if the person don't want to use WMI...

we can use API for getting info of the specified interface...

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/iphlp/iphlp/getiftable.asp
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/iphlp/iphlp/getifentry.asp

once again thanq very much for ur kind suggestion..

decimal numbers conversion

marmosha8-May-06 4:49

marmosha

8-May-06 4:49

Hello every one,
Please I need to know how is it possible to convert a decimal number to its binary, octal, and hex equivalents using C++ but without using predefined functions

marmosha

Re: decimal numbers conversion

Cedric Moonen8-May-06 4:55

Cedric Moonen

8-May-06 4:55

The classical question Unsure | :~

... A number is neither binary, nor octal, nor hex, nor... It is just a number. What is binary or octal is its representation (so how you gonna print the value, to be 'readable' for a human).
A little example: if you have 31 apples on the table, you can say 'I have 31 apples' or 'I have 0x1F apples', you will still have the same number of apples.

So, you want to convert a number into a string ?

Re: decimal numbers conversion

marmosha8-May-06 5:03

marmosha

8-May-06 5:03

i do know that i should use a stirng to represent the decimal number in another format but the point is that i need to know how to get this format that is in the string

Re: decimal numbers conversion

Cedric Moonen8-May-06 5:35

Cedric Moonen

8-May-06 5:35

marmosha wrote:
i need to know how to get this format that is in the string

Which string ?
Could you be more explicit and explain what you are trying to do exactly ?

Re: decimal numbers conversion

David Crow8-May-06 5:38

David Crow

8-May-06 5:38

Here is a base-10 to base-2 converter:

// szBase2 must be at least 33 bytes
void DWORD_To_BinaryString( DWORD dwBase10, char szBase2[] )
{    
    for (int bit = 0; bit < 32; bit++) 
    {        
        DWORD dwMask = 0x80000000 >> bit;        
        
        if ((dwBase10 & dwMask ) == dwMask) 
            szBase2[bit] = '1';        
        else                        
            szBase2[bit] = '0';    
    }    
    
    szBase2[32] = '\0';
}

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: decimal numbers conversion

Eytukan8-May-06 6:34

Eytukan

8-May-06 6:34

will this be ok??

<br />
int deci = 4;<br />
char binStr[10];<br />
binStr=itoa(deci,binStr,2); //2 for bin, 16 for hex <br />
<br />
printf("Binary:%s",binStr);<br />
<br />

ouput:
Binary: 100. Unsure | :~

<marquee scrollamount="1" scrolldelay="1" direction="up" height="10" step="1">--[V]--

[My Current Status]

Re: decimal numbers conversion

David Crow8-May-06 6:46

David Crow

8-May-06 6:46

VuNic wrote:
binStr=itoa(deci,binStr,2); //2 for bin, 16 for hex

It does not satisfy the "but without using predefined functions" requirement.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: decimal numbers conversion

marmosha8-May-06 9:18

marmosha

8-May-06 9:18

Thank you DavidCrow Smile | :)

marmosha

SHBrowseForFolder - start up dir

YaronNir8-May-06 4:25

YaronNir

8-May-06 4:25

is there a way to open the folder dir selection in a specified folder?

i know there is a root folder i can pass to the struct, but then i don't see the folders above it...

thanks

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: SHBrowseForFolder - start up dir

David Crow8-May-06 4:39

David Crow

8-May-06 4:39

YaronNir wrote:
is there a way to open the folder dir selection in a specified folder?

See MSDN article Q179378.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: SHBrowseForFolder - start up dir

YaronNir8-May-06 4:43

YaronNir

8-May-06 4:43

thanks!

i've wrote you a question about MyButton (other thread) probably you haven't seen it??

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: SHBrowseForFolder - start up dir

David Crow8-May-06 4:46

David Crow

8-May-06 4:46

YaronNir wrote:
...probably you haven't seen it??

Yes, I saw it, but the question was a bit unclear.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: SHBrowseForFolder - start up dir

YaronNir8-May-06 4:50

YaronNir

8-May-06 4:50

i have 2 types of buttons in my app, ones i create dynamically using Create Method and by this the OnChildNotify with WM_CTLCOLORBTN working 100% ok. the other type is resource buttons, where i place them in my resource editor on my dialog, and then in my code i use
void CDlg::DoDataExchange(CDataExchange* pDX)
to add a member to my button with the type of MyButton....but in this situation, i don't see the font change??? i've i place a break point (in debug mode) i do step in the if (CTLCOLORBTN == message) and i see the selectobject with my phone, but the result is not font changing but the font i see in the resources...

any ideas?

thanks

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

[OT] Re: SHBrowseForFolder - start up dir

David Crow8-May-06 5:31

David Crow

8-May-06 5:31

That was a mistake on my part. The CFont object should be a member of the dialog, and created in the constructor. In OnInitDialog(), call SetFont() for each of the buttons.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: [OT] Re: SHBrowseForFolder - start up dir

YaronNir8-May-06 5:40

YaronNir

8-May-06 5:40

DavidCrow wrote:
In OnInitDialog(), call SetFont() for each of the buttons.

this is what i wanted to avoid.....that is why i created my class.....
any workaround?

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: [OT] Re: SHBrowseForFolder - start up dir

David Crow8-May-06 9:08

David Crow

8-May-06 9:08

Try:

CMyButton::CMyButton()
{
    LOGFONT lf = {0};

    _tcscpy(lf.lfFaceName, _T("MS Sans Serif"));
    lf.lfHeight = 28;
    lf.lfWeight = FW_BOLD;

    m_font.CreateFontIndirect(&lf);
}
 
void CMyButton::PreSubclassWindow() 
{
    SetFont(&m_font);	
    CButton::PreSubclassWindow();
}

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: SHBrowseForFolder - start up dir

YaronNir8-May-06 5:06

YaronNir

8-May-06 5:06

my msdn didn't find the proper article, can u send me a url to the online article please?

thanks

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: SHBrowseForFolder - start up dir

David Crow8-May-06 5:33

David Crow

8-May-06 5:33

Why did you not just Goggle for it?

Q179378

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"We will be known forever by the tracks we leave." - Native American Proverb

Re: SHBrowseForFolder - start up dir

YaronNir8-May-06 5:51

YaronNir

8-May-06 5:51

thanks works like a charm Smile | :)

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

Re: SHBrowseForFolder - start up dir

jhwurmbach8-May-06 4:42

jhwurmbach

8-May-06 4:42

YaronNir wrote:
is there a way to open the folder dir selection in a specified folder?

This requires a callback.
A quick search in the forum showed e.g. this article[^] as an answer to this all-time-favorite question.

"We trained hard, but it seemed that every time we were beginning to form up into teams we would be reorganised. I was to learn later in life that we tend to meet any new situation by reorganising: and a wonderful method it can be for creating the illusion of progress, while producing confusion, inefficiency and demoralisation."

-- Caius Petronius, Roman Consul, 66 A.D.

Re: SHBrowseForFolder - start up dir

YaronNir8-May-06 4:44

YaronNir

8-May-06 4:44

thanks!!!

Yaron

Interface basics click here :
http://www.codeproject.com/com/COMBasics.asp

don't forget to vote Smile | :)

DLL-problem: memory leaks

hoelrich8-May-06 4:22

hoelrich

8-May-06 4:22

Hallo

,

I have the following problem: in a simple windows application "DynamicLoad.exe" a dll "DefExported.dll" is loaded. If I quit
the dll in InitInstance() with return FALSE instead of return TRUE,
I get memory leaks in the debugger at the end. Is it possible to change this?

Detected memory leaks!
Dumping objects ->
{96} client block at 0x0035A150, subtype c0, 64 bytes long.
a CDynLinkLibrary object at $0035A150, 64 bytes long
Object dump complete.
The program '[444] DynamicLoad.exe: Native' has exited with code 2 (0x2).

(Remark: FreeLibrary( hClcltr ) does not change anything, because return False results in 0 for HINSTANCE hClcltr=LoadLibrary("DefExported.dll").)

The problem is independent of the Microsoft Visual Studio Version (e.g. 6,7,8). The code to try out this, you can look at the page of "DLLs
are Simple! Part 3 By Mahmood Komeily" on this forum.

Just add in DefExported.cpp:

BOOL CDefExportedApp::InitInstance()
{
CWinApp::InitInstance();
return FALSE;
//return TRUE;
}

And in DefExported.h:

class CDefExportedApp : public CWinApp
{
public:
int Multiply(int ParOne,int ParTwo);
CDefExportedApp();

virtual BOOL InitInstance();

...
}

Smile | :)

Re: DLL-problem: memory leaks

Laxman Auti8-May-06 4:33

Laxman Auti

8-May-06 4:33

Check the dynamically allocated memory

Knock out 'T' from CAN'T ,
You 'CAN' if you think you 'CAN'
Cool | :cool:

Re: DLL-problem: memory leaks

hoelrich8-May-06 6:19

hoelrich

8-May-06 6:19

Thank yor for the fast answer. Smile | :)

I myself haven't forgotten to delete again new allocated memory.
Some memory allocations in the Microsoft code causes the leaks.

Maybe there exist work arounds: it's not necessary to quit the dll in
InitInstance(), it could be elsewhere. But in the dll it should be
decided that a loadlibrary-call returns with zero.
I thougth that this could be done best in InitInstance.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.