Re: modulus operator - C / C++ / MFC Discussion Boards

A_Fa12-Jul-06 20:35

12-Jul-06 20:35

Insert Animation Control on dialog .
Add variable from it (m_AVICtrl);
add avi source to your project (IDR_AVI1);
call Open of variable :---> m_AVICtrl.Open(IDR_AVI1) ;
call Play function ---> m_AVICtrl.Play() ;

Re: Play a movie clip

see me12-Jul-06 21:11

see me

12-Jul-06 21:11

better answer you can find here. Posted by me. Mad | :mad:

http://www.codeproject.com/script/comments/forums.asp?msg=1572559&forumid=1647&mode=all&userid=2760032#xx1572559xx[^]

Dream bigger... Do bigger...Expect smaller
aji

Re: Play a movie clip

Hamid_RT12-Jul-06 21:00

Hamid_RT

12-Jul-06 21:00

See mci functions

whitesky

Re: Play a movie clip

see me12-Jul-06 21:06

see me

12-Jul-06 21:06

Can you please tel some thing about the mci function...or any links????

Dream bigger... Do bigger...Expect smaller
aji

Re: Play a movie clip

Hamid_RT12-Jul-06 21:10

Hamid_RT

12-Jul-06 21:10

See http://www.codeproject.com/audio/moemeka7.asp[^]

whitesky

modulus operator

thathvamsi12-Jul-06 17:25

thathvamsi

12-Jul-06 17:25

Hey all,
I need to do this operation

float x;
int y;
int z;

x= (float)((y-z)/60);
if(x % (int)x)!= 0)
{x = (int)x +1;
}

how do i do a mod of float and int. If x is an int then, I can use % operator. But in my case I need to find out if x = 2.1 then I need to round it to 3 ; also if x= 2.6, i need to round it to 3.

How can I do this? Can anyone help? Iam using VC++6.0

Thanks in advance.

Re: modulus operator

nguyenvhn12-Jul-06 18:29

nguyenvhn

12-Jul-06 18:29

<br />
x= (float)((y-z)/60);<br />
x=ceil(x);<br />
if(x % (int)x)!= 0)<br />
{<br />
x = (int)x +1;<br />
}<br />

Re: modulus operator

thathvamsi12-Jul-06 18:36

thathvamsi

12-Jul-06 18:36

hey what happens to
ceil(x);
if x =2.0, then will it be 2.0 or 3.0?

Re: modulus operator

Naveen12-Jul-06 18:41

Naveen

12-Jul-06 18:41

try this

float x = 2.1;
int n= x;
if( n < x )
{
n++;
x = n;// x will contain 3 now
}

nave

Re: modulus operator

thathvamsi12-Jul-06 19:06

thathvamsi

12-Jul-06 19:06

thanks for that.
how do i print a double value? i mean the type specifier?

Re: modulus operator

Naveen12-Jul-06 19:17

Naveen

12-Jul-06 19:17

use %e for double.

chek here for all type specifiers

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vccore98/HTML/_crt_scanf_type_field_characters.asp[^]

nave

help useing Microsoft HTML Object Library in visual c++ 6

method00712-Jul-06 13:14

method007

12-Jul-06 13:14

Hi all . could any one show me how to use [B]Microsoft HTML Object Library [/B] in visual c++ 6 to extract data from html and populate it in listview. I have done this in visual basic 6 and i posted the code below . I be happy if an expert help me convert it to visual c++ 6 since i need it for a project that has to be done in visual c++ 6. My current visual c++ code retrives html of url and all now i need to be able to do extract the data i wanted from html and populate the listview with that data. I shown a picture of output in the pic.Thanks

code that retrives the html for me in visual c++ 6:

<br />
void CFindUserDlg::OnButton4() <br />
{<br />
	// TODO: Add your control notification handler code here<br />
	<br />
HINTERNET hNet = ::InternetOpen("MSDN SurfBear",PRE_CONFIG_INTERNET_ACCESS,NULL,INTERNET_INVALID_PORT_NUMBER,0) ;<br />
HINTERNET hUrlFile = ::InternetOpenUrl(hNet,"http://www.mysite.com/Display.php",NULL,0,INTERNET_FLAG_RELOAD,0) ;<br />
<br />
char buffer[10*1024] ;<br />
<br />
DWORD dwBytesRead = 0;<br />
BOOL bRead = ::InternetReadFile(hUrlFile,buffer,sizeof(buffer),&dwBytesRead);<br />
<br />
SetDlgItemText(IDC_EDIT2,buffer);<br />
<br />
::InternetCloseHandle(hUrlFile) ;<br />
::InternetCloseHandle(hNet) ;<br />
<br />
<br />
	<br />
}

visual basic 6 code:

<br />
<br />
Private Sub Command3_Click()<br />
  'this function places data into listview<br />
  ' requires that you add a reference to the Microsoft HTML Object Library<br />
    Dim mydoc As HTMLDocument<br />
    Dim wombat As IHTMLElementCollection<br />
    Dim lp As Long<br />
    <br />
    Set mydoc = New HTMLDocument<br />
    <br />
    'mydoc.body.innerHTML = "<html><head><p><ul><table border=1 cellpadding=4> " & _<br />
                          '  "<tr><th>Name</th> > <th> color </th> </tr> " & _<br />
                           ' "<tr><td>tony</td> <td>33023</td> " & _<br />
                           ' "<tr><td>cindy</td> <td>16711935</td> " & _<br />
                           ' "<tr><td>sarah</td> <td>3434343</td> " & _<br />
                           ' "</table> </body></html>"<br />
                            <br />
    mydoc.body.innerHTML = RichTextBox1.Text<br />
    <br />
 Set wombat = mydoc.getElementsByTagName("TR") ' Get the rows<br />
    For lp = 1 To wombat.length - 1 ' Ignore first row<br />
        Set LI = ListView1.ListItems.Add(lp, , wombat.Item(lp).All.Item(0).innerText)<br />
        ListView1.ListItems(lp).ForeColor = wombat.Item(lp).All.Item(1).innerText<br />
        LI.ListSubItems.Add , , wombat.Item(lp).All.Item(1).innerText<br />
        <br />
    Next<br />
End Sub

picuture of the output:

[IMG]http://i5.photobucket.com/albums/y180/method007/ListViewPop.jpg[/IMG]

Re: help useing Microsoft HTML Object Library in visual c++ 6

nguyenvhn12-Jul-06 18:32

nguyenvhn

12-Jul-06 18:32

Why dont you use Regular Expression to extract data?

Re: help useing Microsoft HTML Object Library in visual c++ 6

method00712-Jul-06 18:47

method007

12-Jul-06 18:47

well i do not know how to use it . could u show me how to extract it using either method and populate the listview.thanks

C++ memory question

mdexch12-Jul-06 12:59

mdexch

12-Jul-06 12:59

The following program doesn't free all the memory. Can any one tell me what is wrong with the code?

Thanks.

//
wchar_t *pwcTest = L"Test";
int g_I=1000;
void AllocateMem(wchar_t ***pwcArray)
{
*pwcArray = (wchar_t**)new wchar_t*[g_I+1];
ZeroMemory(*pwcArray, sizeof(wchar_t*)*g_I+1);
for(int i=0; i<g_I; i++) {
(*pwcArray)[i] = (wchar_t*)new wchar_t[wcslen(pwcTest)+1];
wcscpy((*pwcArray)[i], pwcTest);
}
(*pwcArray)[i] = NULL;
}

void FreeArray(wchar_t **pwcDC)
{
if(pwcDC != NULL) {
for(int i=0; pwcDC[i] != NULL; i++)
delete [] pwcDC[i];
delete [] pwcDC;
}
}

int main( int argc, char *argv[ ])
{
char s[2];

printf("main:\n");
fscanf(stdin, "%s", s);
// Mem Usage (in the Windows Task Manager): 632K

wchar_t **pwcArray = NULL;

for (int i=0; i<1000; i++) {
AllocateMem(&pwcArray);
FreeArray(pwcArray);
}
printf("main: %d\n", i);
fscanf(stdin, "%s", s);
// Mem Usage: 688K (g_I=1000)
// Mem Usage: 908K (g_I=10000)

return 0;
}
//

mdexch

Re: C++ memory question [modified]

earl12-Jul-06 14:11

earl

12-Jul-06 14:11

I reformatted your code to make it easier for me to read, particularly since C++ (which you are using) provides references.

wchar_t *pwcTest = L"Test";
int g_I=1000;

void AllocateMem(wchar_t**& pwcArray)
{
    pwcArray = new wchar_t*[g_I+1];
    
	ZeroMemory(pwcArray, sizeof(wchar_t*) * (g_I+1) );

    for(int i=0; i<g_I; i++) {
        pwcArray[i] = new wchar_t[ wcslen(pwcTest) + 1 ];    
        wcscpy(pwcArray[i], pwcTest);
    }
    pwcArray[ g_I ] = NULL;
}

void FreeArray(wchar_t **pwcDC)
{
    if(pwcDC != NULL) {
        for(int i=0; pwcDC[i] != NULL; i++)
            delete [] pwcDC[i];
        delete [] pwcDC;
    }
}

int main( int argc, char *argv[ ])
{
    char s[2];

    printf("main:\n");
    fscanf(stdin, "%s", s);
    // Mem Usage (in the Windows Task Manager): 632K

    wchar_t** pwcArray = NULL;

	int i;
    for (i=0; i<1000; i++) {
		if (i%100 == 0)
			fprintf(stdout, "%d\n", i);

        AllocateMem(pwcArray);
        FreeArray(pwcArray);
    }
    printf("main: %d\n", i);
    fscanf(stdin, "%s", s);
    // Mem Usage: 688K (g_I=1000)
    // Mem Usage: 908K (g_I=10000)

    return 0;
}

I don't believe my version leaks memory, though I only spent a couple minutes on this. The CRT will ask windows for memory then hold on to it for future requests, even if from your perspective you haven't currently allocated it -- or at least this is my understanding.

earl

PS: VS2005: beginning 960K, end 1000K, regardless i = {1000,10000,50000}

-- modified at 19:28 Wednesday 12th July, 2006

Re: C++ memory question

mdexch14-Jul-06 8:58

mdexch

14-Jul-06 8:58

Look like a CRT issue. On .Net 2003 compiler I see less memory allocation but different for different array size. May be 2005 is different.

Thanks for the input.

mdexch

Re: C++ memory question

Joe Woodbury12-Jul-06 15:11

Joe Woodbury

12-Jul-06 15:11

I didn't see a leak; do note that when a heap is allocated, it may not be entirely released until the CRT deinitializes. This is not a memory leak, but an optimization.

I did see a problem with your code, though:

*pwcArray = (wchar_t**)new wchar_t*[g_I+1];<br />
ZeroMemory(*pwcArray, sizeof(wchar_t*)*g_I+1);

Note that you are allocating g_I + 1. The last item is being used as a guard item. Yet when zeroing the memory, you are zeroing out 4001 bytes (when g_I is set to 1000), not 4004. You need to wrap parenthesis around g_I + 1 as follows:

ZeroMemory(*pwcArray, sizeof(wchar_t*)*(g_I+1));

I would recommend placing the wchar_t strings in a struct with a destructor and then making the array and array of these structures (or use string or CString).

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

Re: C++ memory question

kanduripavan12-Jul-06 21:46

kanduripavan

12-Jul-06 21:46

for(int i=0; pwcDC[i] != NULL; i++)
//How can be the above expression can be valid one that
is the one which is checking "pwcDC[i] != NULL" in which
we may actually be doing ABR( Array bound read) or anything so.
I am begginer in this so can u help me in this ?.

Thanks

Pavan

Re: C++ memory question

Joe Woodbury13-Jul-06 1:11

Joe Woodbury

13-Jul-06 1:11

Assume you have an array of 5 pointers, the last slot always has a NULL value and the first 4 always have valid pointers. You can then loop through the array until you find the NULL pointer.

With rare exceptions, this is a terrible programming technique. It is best to simply use the known bounds of the array or, better yet, use a collection class.

Anyone who thinks he has a better idea of what's good for people than people do is a swine.
- P.J. O'Rourke

sscanf will only put value in first variable

Evilpixie12-Jul-06 12:32

Evilpixie

12-Jul-06 12:32

<small>Hi,
I am reading a text file line by and line and reading the values into variables using sscanf. The problem I am having is that sscanf will return the correct value for the number of columns that I have, however, it only puts the first value into first variable and ignores the remaining variables.

This is a snippet of the text file I am reading:

</small>
<code>Y8145L 0 1 1
Y8148L 0 1 1</code>

This is the code snippet:
<code>while(fgets(pointListID, sizeof(pointListID), unit1File))
{
if(feof(unit1File))
break;

double testA;
double testB;
double testC;
char testshortPointID[8];
if((sscanf(pointListID, "%s %d %d %d",&testshortPointID, &testA, &testB, &testC))==4)
{...}</code>

testA, testB and testC values never change when I run this.
Any help is appreciated!

Sande

Re: sscanf will only put value in first variable [modified]

earl12-Jul-06 13:46

earl

12-Jul-06 13:46