C / C++ / MFC Discussion Boards

Re: String search in a file(very urgent)

yaminisridaran2-Apr-07 0:21

yaminisridaran

2-Apr-07 0:21

Thanks

S.Yamini

Re: String search in a file(very urgent)

Parthi_Appu1-Apr-07 23:44

Parthi_Appu

1-Apr-07 23:44

yaminisridaran wrote:
because i am alternative characters from the file

I think you missed some thing here...

Generally to find a string, use comparision APIs, say strcmp, CString::Compare and also APIs are available for case in sensitive comparing..

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Re: String search in a file(very urgent)

yaminisridaran2-Apr-07 0:57

yaminisridaran

2-Apr-07 0:57

Actually I have a txt file and i want to fetch the last string of the file.Can u help in this

S.Yamini

Re: String search in a file(very urgent)

Parthi_Appu2-Apr-07 1:25

Parthi_Appu

2-Apr-07 1:25

yaminisridaran wrote:
I have a txt file and i want to fetch the last string of the file

Actually i donno any API for this, but i'll you an algo for this,
1) Open the File as Random file
2) Move the file pointer to end of file (using seek method)
--inside loop
3) Decrement the pointer and read a char (to read the char before, using seek method)
4) check for delimiting chars (say space, or some thing else)
5) if not a delimiting char then append the char to a string
6) decrement the file pointer (to set to previous position, using seek method)
7) goto step 3 (have to decrement again, to get previous char)
8) if its a delimiting char then break the loop.
--end of loop
Now you got the last word in the file, but it'll be in reverse. So apply strrev and get the original string..

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Re: String search in a file(very urgent)

yaminisridaran2-Apr-07 1:57

yaminisridaran

2-Apr-07 1:57

I tried this procedure but the decrementing the pointer and reading the data gives me data as -1

S.Yamini

Re: String search in a file(very urgent)

Parthi_Appu2-Apr-07 2:06

Parthi_Appu

2-Apr-07 2:06

Can you show some code..which tells hw you implemented

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Re: String search in a file(very urgent)

yaminisridaran2-Apr-07 2:14

yaminisridaran

2-Apr-07 2:14

FILE *fp;
int a;
CString m_buffer;
fp=fopen("yamini.txt","r+");
fseek (fp , 0 , SEEK_END);
fp--;
while(1)
{
a=fgetc(fp);
if(a==32)
break;
else
m_buffer+=(char)a;
fp--;
}

S.Yamini

Re: String search in a file(very urgent)

Parthi_Appu2-Apr-07 2:22

Parthi_Appu

2-Apr-07 2:22

see the comments and changes

FILE *fp;
int a;
CString m_buffer("");
fp=fopen("yamini.txt","r+");
fseek (fp , 0 , SEEK_END);
//fp--; /* not like this */
while(1)
{
fseek(fp, -1, SEEK_CUR); /* i mentioned to use seek method */
a=fgetc(fp);
if(a==32)
break;
else
m_buffer+=(char)a;
//fp--; /*not like this */
fseek(fp, -1, SEEK_CUR);
}

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Re: String search in a file(very urgent)

David Crow2-Apr-07 4:09

David Crow

2-Apr-07 4:09

What defines (i.e., delimits) the "last string?"

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intial folder with standard class CFileDialog

Ing.Raiz821-Apr-07 22:58

Ing.Raiz82

1-Apr-07 22:58

Hi,

i want to see the folder that i want, when i call the:

CFileDialog dlg(TRUE, _T("dgl"), _T("Playlist"), OFN_FILEMUSTEXIST, szFilters, this);
dlg.doModal

have you got an idea...

thanks

Raiz Laugh | :laugh:

Re: intial folder with standard class CFileDialog

prasad_som1-Apr-07 23:18

prasad_som

1-Apr-07 23:18

Use CFileDialog::m_ofn-->lpstrInitialDir .Modify your code like this,

CFileDialog dlg(TRUE, _T("dgl"), _T("Playlist"), OFN_FILEMUSTEXIST, "*.*", this);
dlg.m_ofn.lpstrInitialDir = "c:\\";//mention folder you want to display initialy
dlg.DoModal();

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: intial folder with standard class CFileDialog

Ing.Raiz821-Apr-07 23:38

Ing.Raiz82

1-Apr-07 23:38

CFileDialog dlg(TRUE, _T("dgl"), _T("Playlist"), OFN_FILEMUSTEXIST, "*.*", this);
dlg.m_ofn.lpstrInitialDir = "c:\\";//mention folder you want to display initialy
dlg.DoModal();

dlg don't see .m_ofn have you got an idea?

thanks

Giulio Big Grin | :-D

Re: intial folder with standard class CFileDialog

prasad_som1-Apr-07 23:47

prasad_som

1-Apr-07 23:47

Ing.Raiz82 wrote:
dlg don't see .m_ofn have you got an idea?

What ? its member of CFileDialog.

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: intial folder with standard class CFileDialog

Ing.Raiz821-Apr-07 23:50

Ing.Raiz82

1-Apr-07 23:50

i use this...
dlg.m_pOFN->lpstrInitialDir = "c:\\";

because i don't find ....m_ofn

thanks...

Re: intial folder with standard class CFileDialog

prasad_som1-Apr-07 23:56

prasad_som

1-Apr-07 23:56

Ing.Raiz82 wrote:
because i don't find ....m_ofn

What ??

Are you sure ?

Prasad
Notifier using ATL | Operator new[],delete[][^]

Re: intial folder with standard class CFileDialog

Ing.Raiz822-Apr-07 0:14

Ing.Raiz82

2-Apr-07 0:14

boh...

i'm novice... it's possibile that i don't see...

but it work with m_pofn....

mistery of c++...

ehheheh byeeee Big Grin | :-D

USB VBus disable through software

shishirsingh1-Apr-07 22:57

shishirsingh

1-Apr-07 22:57

I am writing a code through which i want to disable the USB VBus power supply.I am able to disable the device and set the device current state to D3 mode but it is not cutting off VBus.Is this possible using windows-XP API? plz do reply.......

About Dll Export and Import

siddharthsan1-Apr-07 22:42

siddharthsan

1-Apr-07 22:42

Hi,

I have to export a class and it's function from a dll(this dll is already exists) then i have to import that class in to my application???
So,I did as,

In that dll defined a macro as DLLExport:
#ifdef DllExport
#define DllExport __declspec( dllexport )
#endif

In the class declaration gave as,
class DllExport ATL_NO_VTABLE CShockwaveFlash:

What i have to do after this???

Thanks and Regards,

Siddharth

Re: About Dll Export and Import

toxcct1-Apr-07 23:00

toxcct

1-Apr-07 23:00

please read this[^]

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Re: About Dll Export and Import

siddharthsan2-Apr-07 0:06

siddharthsan

2-Apr-07 0:06

Thank you

Actually,Dll which I am using is an exising dll.So I exported and imported the class and changed the project settings according to the tutorials.

Now I included the header file in my sample application ,but it is not recognizing the file???
please help me...

Siddharth

Re: About Dll Export and Import

Eytukan1-Apr-07 23:38

Eytukan

1-Apr-07 23:38

Can you explain it better?

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Re: About Dll Export and Import

siddharthsan2-Apr-07 0:08

siddharthsan

2-Apr-07 0:08

I am using an existing dll and I want to export class from it.And I created a sample application(mfc) to import that particular class...

So I used the steps above.But how I can check whether the class is exported or not ???

minimized appllication when double click in task bar

Ing.Raiz821-Apr-07 21:53

Ing.Raiz82

1-Apr-07 21:53