C / C++ / MFC

1-Jan-08 20:57

You missed the point (and the following 'h'). Big Grin | :-D

Change

#include <stdlib>

#include <stdlib.h>

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.

[my articles]

Re: building error

Hamid_RT2-Jan-08 2:48

Hamid_RT

2-Jan-08 2:48

Can you show your code for header file?

Re: building error

gentleguy2-Jan-08 19:35

how to create a matrix with c++? [modified]

2-Jan-08 19:35

yes, right, i always think "libaray.h"and <library>, no .h. but actually i use fith edition of c++, it is also available for <clibrary>,thanks a lot.

Li Zhiyuan

3/1/2008

gentleguy1-Jan-08 16:48

1-Jan-08 16:48

dear all

how to create a matrix for example 3x4 using c++ as soon as possible? thanks in advance.

sincerely

Zhiyuan

2/01/2008

modified on Tuesday, January 01, 2008 11:16:23 PM

Nishad S1-Jan-08 18:18

1-Jan-08 18:18

You mean array of integers?
Then, int a[3][4];

- NS -
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gentleguy1-Jan-08 19:05

1-Jan-08 19:05

how to create random real number matrix 3x4?thanks

Li Zhiyuan

5/10/2006

Nishad S1-Jan-08 19:13

1-Jan-08 19:13

li zhiyuan wrote:
random real number matrix

I didnt get you... Frown | :(

You mean elements as real numbers?

If so float a[3][4];

And for getting random numebrs you can use rand(). But it is returning integer values. So you have to convert it to real. For example,

float f = ( rand() % 1000 ) / 1000; // random number between 0 and 1

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CPallini1-Jan-08 21:22

1-Jan-08 21:22

NS17 wrote:
float f = ( rand() % 1000 ) / 1000; // random number between 0 and 1

the above always evaluates to

float f = 0;

Moreover, the best way to produce statistically meaningful random values inside a range is (see http://msdn2.microsoft.com/en-us/library/398ax69y.aspx[^])

int u = (double)rand() / (RAND_MAX + 1) * (range_max - range_min) + range_min;

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.

[my articles]

Nishad S1-Jan-08 23:18

1-Jan-08 23:18

CPallini wrote:
the above always evaluates to

float f = 0;

Yes. I forgot about the casting... Smile | :)

It has to be
float f = ( rand() % 1000 ) / 1000.0;

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CPallini1-Jan-08 21:29

1-Jan-08 21:29

for instance:

const double MIN_RANGE = 3.0;
const double MAX_RANGE = 1200.0;
// change the range to fit your needs, of course keep MAX_RANGE > MIN_RANGE
int i,j;
double m[3][4];
for (i=0; i<3; i++)
{
  for (j=0; j<4; j++)
  {
     m[i][j] = (double)rand() / (RAND_MAX + 1) * (MAX_RANGE - MIN_RANGE) + MIN_RANGE;
  }
}

see MSDN http://msdn2.microsoft.com/en-us/library/398ax69y.aspx[^]

Smile | :)

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.

[my articles]

Nishad S1-Jan-08 23:26

1-Jan-08 23:26

CPallini wrote:
m[i][j] = (double)rand() / (RAND_MAX + 1) * (MAX_RANGE - MIN_RANGE) + MIN_RANGE;

why (RAND_MAX + 1) is needed?

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gentleguy2-Jan-08 20:41

Capture Left Mouse [modified]

2-Jan-08 20:41

const double MIN_RANGE = 3.0;
const double MAX_RANGE = 1200.0;
// change the range to fit your needs, of course keep MAX_RANGE > MIN_RANGE
int i,j;
double m[3][4];
for (i=0; i<3; i++)
{ for (j=0; j<4; j++)
{ m[i][j] = (double)rand() / (RAND_MAX + 1) * (MAX_RANGE - MIN_RANGE) + MIN_RANGE;
}
}

however i couldn't get m=3x4 matrix yet, please can give me detail..i did in IDE.

the reslut is 0013fecc..

thanks a lot

Li Zhiyuan

3/1/2008

Dll import/export

ForNow1-Jan-08 15:41

ForNow

1-Jan-08 15:41

Hi,

I am mainframe programmer as such its been really difficult to make the transition to OO way of thinking anyway....

I have a table or a structure which I would like to make dynamic
meaning I can add an entry to it and just re-compile and re-build it

IS DLL export/import they way to go meaning when I define the structure add dllexport to the defination

and make the structure a DLL and get the address of the table with GetProcAddress

Thankx

Oliver1231-Jan-08 13:01

Oliver123

1-Jan-08 13:01

1. Lets say I have a MFC SDI with a dialog containing 5 edit boxes.
2. I want to left click on any of the five edits and generate "Hello" in it.
3. I have reached the point where I can click anywhere on the dialog and generate "Hello" into one single edit box.
4. I haven't figured out how to determine if the click is in one of the edit boxes rather than anywhere in the dialog.
5. Then I need to know which edit box.

So, I need advice on #4 and #5. Here is what I have:

CTest.h
afx_msg void OnLButtonDown(UINT nFlags, CPoint point);

CTest.cpp

BEGIN_MESSAGE_MAP(CTest, CDialog)<br />
	//{{AFX_MSG_MAP(CTest)<br />
  ON_WM_LBUTTONDOWN()<br />
	//}}AFX_MSG_MAP<br />
END_MESSAGE_MAP()<br />
...<br />
void CTest::OnLButtonDown(UINT nFlags, CPoint point) <br />
{	<br />
	CDialog::OnLButtonDown(nFlags, point);  //this is anywhere on the dialog<br />
	GetDlgItem(IDC_EDIT_C1L1)->SetWindowText("Hello");  //if I knew where it clicked, I could target correct editbox<br />
}

Thanks

modified on Tuesday, January 01, 2008 7:07:59 PM

Re: Capture Left Mouse

Nishad S1-Jan-08 18:33

convert integer number to string text

1-Jan-08 18:33

Try as follows...

BOOL CTestDlg::PreTranslateMessage(MSG* pMsg) 
{
    if( pMsg->message == WM_LBUTTONDOWN )
    {
        if(( pMsg->hwnd == GetDlgItem( IDC_EDIT1 )->m_hWnd ) ||
           ( pMsg->hwnd == GetDlgItem( IDC_EDIT2 )->m_hWnd ))
        {
            ::SetWindowText( pMsg->hwnd, "Hello" );
        }
    }
	return CDialog::PreTranslateMessage(pMsg);
}

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Re: Capture Left Mouse

Mark Salsbery2-Jan-08 7:40

Mark Salsbery

2-Jan-08 7:40

When you click on an edit control, the message goes to the
edit control window, not to the dialog window.

You could derive a class from CEdit and use that class to
subclass the edit controls. When your CEdit-derived class gets a
WM_LBUTTONDOWN message, it could notify its parent by posting an
app-specific message.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

KARFER1-Jan-08 8:12

KARFER

1-Jan-08 8:12

Hi all

please how i can convert integer number to string text like this
(i entered 7 in keyboard and the output will be seven)

thank's for all

-*-*-*-*-*-*-*-*-*
To Be Or Not To Be
(KARFER)
-*-*-*-*-*-*-*-*-*

CPallini1-Jan-08 8:25

1-Jan-08 8:25

you may use the function sprintf function, for instance

int i;
char buffer[20];/* just make sure the buffer is big enough */
i=7;
sprintf(buffer,"%d", i);

or, if you prefer the CString class

int i;
CString str;
i=7;
str.Format("%d", i);

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.

[my articles]

KARFER3-Jan-08 1:24

KARFER

3-Jan-08 1:24

O.K

Thank's For all

I'll Be There

Luc Pattyn1-Jan-08 8:46

Luc Pattyn

1-Jan-08 8:46

CP holds some articles on number-to-text conversion.

Smile | :)

Luc Pattyn [Forum Guidelines] [My Articles]

Happy 2008!

Hamid_RT2-Jan-08 2:53

Hamid_RT

2-Jan-08 2:53

And see The Complete Guide to C++ Strings, Part II - String Wrapper Classes[^] for other converts.

Joan M2-Jan-08 9:47

Joan M

2-Jan-08 9:47

If I understood you well, you are asking how to get the name of the number, not the number itself inside a string.

So you are not asking for:

int iNumberSeven = 7;<br />
CString csAux = "";<br />
csAux.Format("%i",iNumberSeven);

you are asking for something like:

if (iNumberSeven == 7)<br />
{<br />
  csAux = "seven";<br />
}

If you meant the second option, the only way I can think of is to try to generate the numbers programmatically. And this would mean to study the way the numbers are formed and of course having some basic strings in a vault in order to be able to use them.