C / C++ / MFC

Re: c++ to c code conversion

27-Dec-05 0:53

I dont know if any tool is available for such converson.
But if the code is in C++ and uses Classes with
virtual function its really difficult to convert such
code to C .
Yeh but it can be done (c++ code can be converted to c)
Cool | :cool:

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

John R. Shaw27-Dec-05 10:16

John R. Shaw

27-Dec-05 10:16

It can be done; I just would not like to do it.
How diffecult it will be depends on what features of C++ the code uses. You may find you self needing to write C versions of the STL templates.

The original C++ just used a preprocessor to convert the C++ code to C code and then called a C compiler. Modern day compilers do not require the conversion.

You can try to see if I am wrong and there is still a modern standards compliant enviroment that uses this method. You could also try to get a copy of the original, to see how it worked (the code should be out there). But of course the original would not be compliant with the current standard.

INTP
Every thing is relative...

Re: c++ to c code conversion

TheGreatAndPowerfulOz5-Jan-06 11:03

TheGreatAndPowerfulOz

5-Jan-06 11:03

Google for CFRONT. CFRONT was the original C++ compiler which compiled C++ to C as one of its steps.

How to calculate power (Exponent)

vikas amin26-Dec-05 23:06

26-Dec-05 23:06

How can i calculate power or exponent

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

Owner drawn26-Dec-05 23:17

Owner drawn

26-Dec-05 23:17

Take a look at the pow(...,...) function.

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vikas amin26-Dec-05 23:39

26-Dec-05 23:39

yeh i actully didnot want to use
pow ,
but now its ok
thank u

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

toxcct27-Dec-05 1:28

27-Dec-05 1:28

x^y :

for (int i = 0; i < y; i++) {
    x *= x;
}

of course, this doesn't work for float powers... you'll have to find a better algorithm on the web maybe, or use assembly.

if you have the/a solution, please share it with us !

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

vikas amin27-Dec-05 1:37

27-Dec-05 1:37

Yeh Assembly is the solution for my issue

thanks

Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com

toxcct27-Dec-05 1:39

27-Dec-05 1:39

is it really big for not posting it here ?! Big Grin | :-D

i'd be curious to see how this is done ... :p

cheers,

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

Owner drawn27-Dec-05 1:56

Owner drawn

27-Dec-05 1:56

Hmmm...

Waiting for it buddy. Big Grin | :-D

TheGreatAndPowerfulOz5-Jan-06 20:10

TheGreatAndPowerfulOz

5-Jan-06 20:10

toxcct wrote:
for (int i = 0; i < y; i++) { x *= x;}

sorry, this is incorrect code

consider where x = 2 and y = 5 (2^5)

then with above code you would be doing this
x *= 2 (x = 2 * 2)
x *= 4 (x = 4 * 4)
x *= 16 (x = 16 * 16)
x *= 256 (x = 256 * 256)
x *= 65536 (x = 65536 * 65536)

finally ending up with 4294967296 which is obviously not the correct answer

the correct code would be

int result = 1;
int y = 5;
int x = 2;
for (; y--; ) result *= x;

which would word for any arbitrary x > 0 and y >= 0

toxcct6-Jan-06 0:41

Property Page Tab should highlight

6-Jan-06 0:41

sorry, i meant x *= y

TOXCCT >>> GEII power
[toxcct][VisualCalc 2.20][VisualCalc 3.0]

RamL26-Dec-05 22:32

RamL

26-Dec-05 22:32

Hi,

I am working on VC++ project. Property Sheet has a number of property pages, so I want to highlight each property page TAB on its selection. Hightlight means it may paint each page TAB portion or should show same TAB text with different color.

Would you tell me the the way, How can I do it?

Thanks in advance,

Ramesh

Blush | :O

Re: Property Page Tab should highlight

Owner drawn26-Dec-05 23:20

Owner drawn

26-Dec-05 23:20

You can do that in the OnSetActive() method...

Also take a look at the GetTabControl() method of the CPropertySheet Class. It returns a reference to a particular CTabCtrl object.

CTabCtrl class has a method called CTabCtrl::HighlightItem.

BOOL HighlightItem(
  int idItem,
  BOOL fHighlight = TRUE 
);

Hope this will be sufficient for you... Smile | :)

Re: Property Page Tab should highlight

RamL28-Dec-05 2:00

RamL

28-Dec-05 2:00

Thanks,

I want to re-modify my question.

When we select the property sheet page tabs, then the selected page tab text should change the color of page tab text or highlight the tab text.

Error is comming from the fallowing snippet that is,

<big>Error : " 'CPropertySheet::GetTabControl' : illegal call of non-static member function"</big>

How to access the GetTabContol() from CPropertyPage derived class?

<code>BEGIN_MESSAGE_MAP(CPage2, CPropertyPage)
//{{AFX_MSG_MAP(CPage2)
// NOTE: the ClassWizard will add message map macros here
//}}AFX_MSG_MAP
END_MESSAGE_MAP()

BOOL CPage2::OnSetActive()
{
CTabCtrl *pTabCtrl = CPropertySheet::GetTabControl();

TC_ITEM item;
item.mask = TCIF_TEXT;
item.pszText = "New Label";

pTabCtrl->SetItem (1, &item );

// CTabCtrl::HighlightItem(1, TRUE);

return CPropertyPage::OnSetActive();
}</code>

wating for you reply,

- Ramesh.

installer for oracle db

prabhathgk26-Dec-05 22:12

prabhathgk

26-Dec-05 22:12

I want to make an oracle db installer for my program. When it is executed it should be able to search the tnsnames.ora and list the services in combo box. Up to this it is finished(got the idea from http://www.codeproject.com/database/OSidList.asp)

Now, I want to:
1. logging to the service with login id and password :
2. after successful login all the users under the service should be listed. I can either choose the existing user or create a new user with sufficient rolls.
3. after that I want to execute scripts for creating tables etc. These scripts are stored in separate folder.

How will I write functions which perform the above tasks?

File I/O que

LiYS26-Dec-05 22:03

LiYS

26-Dec-05 22:03

Hi all:

I'm under VC++ 7.0, and new to it. Regarding the following code

CFile file;
if ( ! file.Open(LPCTSTR ("C:\\Test.xml"), CFile::modeRead ) )
{
    return;
}

After open operation why the file alway invalid?I don't see any problem!

ThatsAlok26-Dec-05 22:24

ThatsAlok

26-Dec-05 22:24

LiYS wrote:
if ( ! file.Open(LPCTSTR ("C:\\Test.xml"), CFile::modeRead ) )

Is Test.xml is exist at C:, as CFile::ModeRead will get failed if file requested isn't found.

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

LiYS26-Dec-05 22:50

LiYS

26-Dec-05 22:50

ThatsAlok wrote:
Is Test.xml is exist at C:,

That was confirmed!

ThatsAlok26-Dec-05 23:51

ThatsAlok

26-Dec-05 23:51

LiYS wrote:
That was confirmed!

I am lil Confused! what was confirmed?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta
VC Forum Q&A :- I/ IV

toxcct26-Dec-05 22:40