C / C++ / MFC

how to insert a back slash \ in a string

12-Aug-05 5:36

Graham Bradshaw wrote:
I always thought that integral type meant one defined by the compiler, char, int, float etc, but perhaps someone thinks it means data members that can hold integral (ie no floating point) values...

Indeed. From MSDN C/C++ Language Reference - Fundamental Types[^]:

"Fundamental types in C++ are divided into three categories: integral, floating, and void. Integral types are capable of handling whole numbers. Floating types are capable of specifying values that may have fractional parts."

--
jlr
http://jlamas.blogspot.com/[^]

Re: Compiler fun

C^hris L^osinger12-Aug-05 4:08

C^hris L^osinger

12-Aug-05 4:08

doesn't look like a compiler bug, since the message you get clearly indicates that the compiler knows what's going on and that it will not do what you ask.

maybe try this thread[^]

Cleek | Image Toolkits | Thumbnail maker

caykahve11-Aug-05 21:50

11-Aug-05 21:50

Hi,

I get a path like "C:\folder" in my program. And I want to use it in a function which needs "C:\\folder". I wanted to use CString::Insert() function, but I got the error message 'new line in constant' when I use this: "\"

How can I insert a \ in a string?

Thanks in advance
caykahve

Cedric Moonen11-Aug-05 21:53

Cedric Moonen

11-Aug-05 21:53

'\' are used for escape characters. If you want that in a string, you need to add another extra \: "C:\\folder".

But as I see your error, I think this is due to the fact that you forgot to 'close' your string (you probably forgot the ")

Hope this helps.

caykahve11-Aug-05 22:11

11-Aug-05 22:11

I don't know how deep the first path exactly.

To be more precise, i can add my code here:

// Here I have PFPath as "C:\folder1\folder2"<br />
   int i=0;<br />
   while( PFPath.Find("\",i)!=-1 )<br />
   {     <br />
      PFPath.Insert(i,(CString)".\");<br />
      i+=2;           <br />
   }<br />
   // Here I want to have PFPath as "C:\\folder1\\folder2"

Cedric Moonen11-Aug-05 22:16

Cedric Moonen

11-Aug-05 22:16

Replace all "\" by "\\".

In this line:
PFPath.Insert(i,(CString)".\");
Why is it a ".\" ?? Why do you insert a '.' ?

caykahve11-Aug-05 22:43

11-Aug-05 22:43

I already tried replacing the "\" with "\\". the program can be compiled, but the result is erroneous:
Then i have at the beginning of the snippet PFPath: "C:\folder1\folder2" and
PFPath: "\" at the end of the snippet.

I don't have '.' normally, it was "\". It's a typo that occurred during copying here to the messageboard.

Cedric Moonen11-Aug-05 22:52

Cedric Moonen

11-Aug-05 22:52

caykahve wrote:
// Here I have PFPath as "C:\folder1\folder2"
int i=0;
while( PFPath.Find("\",i)!=-1 )
{
PFPath.Insert(i,(CString)".\");
i+=2;
}
// Here I want to have PFPath as "C:\\folder1\\folder2"

Ok, another problem is here: the find function returns the starting position of the substring found in the string. So, when you insert the new character, it will insert it at the position 'i' that is left the same (so 0 in the first case). You must take the value returned by Find() and insert the new char there.

caykahve11-Aug-05 23:24

11-Aug-05 23:24

OK, you are right. But still the insert function does not work properly. Here is the changed code snippet:

int i=0;   <br />
   i = PFPath.Find("\\",i);<br />
   while( i>-1  )<br />
   {           <br />
      CString found;<br />
      found.Format("Backslash found at index: %d",i);<br />
      MessageBox(found);<br />
<br />
      PFPath.Insert(i,(CString)"\\");      <br />
      MessageBox(PFPath);<br />
      i += 2;<br />
      i = PFPath.Find("\\",i);        <br />
   }<br />
   if(i==-1)<br />
      MessageBox("not found");<br />
   MessageBox(PFPath);

Output:
Backslash found at index: 2
C:\folder1
\
not found
\

David Crow12-Aug-05 3:22

David Crow

12-Aug-05 3:22

If C:\folder is something that you typed at a command prompt or in some text box, there is no need to replace one backslash with two. This is user input, which differs from string literals in your code. Whatever function is using the folder name will work correctly.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

caykahve12-Aug-05 5:47

12-Aug-05 5:47

C:\folder is actually is not a user input, it is

// Get Program Files Path <br />
SHGetSpecialFolderPath(NULL,PFPath.GetBuffer(_MAX_PATH), CSIDL_PROGRAM_FILES, FALSE);<br />

and it gets "C:\Program Files" exactly.

I add something at the end of this string and then i try to use it in

<br />
CString WholePath = PFPath + (CString)"\\....\\file.exe;<br />
SHELLEXECUTEINFO shellInfo;<br />
...<br />
shellInfo.lpFile = WholePath;<br />
::ShellExecuteEx(&shellInfo);

If I do not use double slash, I get the error: "The program cannot find the file specified"
That's why I need double slash.

Why is it so hard to insert the required character in to a string I don't understand. Sigh | :sigh:

Is there some other way to obtain "C:\\Program Files"?

socket communication with video

David Crow12-Aug-05 6:06

David Crow

12-Aug-05 6:06

You are still have a bit confused. There is no need to change PFPath, and the string literal being appended to it is fine (because it contains the necessary double backslashes). You don't need to insert anything additional. The variable WholePath contains what it needs to.

caykahve wrote:
If I do not use double slash, I get the error: "The program cannot find the file specified"

Rightly so. But the code snippet you've shown does have a double backslash so I don't see the problem.

caykahve wrote:
Is there some other way to obtain "C:\\Program Files"?

Why, when you are already doing it correctly?

If you tried to access a file using code like:

"c:\program files\some_folder\mydata\file.dat"

not only would the compiler complain about illegal escape characters (e.g., \p and \s and \m make no sense, but \f does), it would have interpreted that as

"c:rogram filesome_folderydata\file.dat"

hence the file not being found.

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

Nishad S11-Aug-05 21:41

Nishad S

11-Aug-05 21:41

Hello,

I'm trying to develope a software to capture video from a webcam and sending it through internet.

The primary need is to view through the camera in my building, through the internet, from somewhere else.

I have the knowledge about how to program using CSocket in VC++.

Can any body tell me how to achieve this, please?

Or can you suggest any helpful link or something else?

Thank you.

Re: socket communication with video

ThatsAlok11-Aug-05 22:24

ThatsAlok

11-Aug-05 22:24

Nishad S wrote:
The primary need is to view through the camera in my building, through the internet, from somewhere else.

This Will help you:-
http://www.codeproject.com/internet/shoonyaintntbrdcast.asp[^]

"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

Sorting List View

BicycleTheif11-Aug-05 20:45

BicycleTheif

11-Aug-05 20:45

I have a list view which needs to be sorted based on a click on header.I am using the ListCtrl.SortItems() function. But it is crashing when i clicked on the header.For better understanding i have listed the code.

void CDirTreeDemoView::OnColumnClick(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*) pNMHDR;
this->GetListCtrl().SortItems (CompareFunc, pNMListView->iSubItem);
*pResult = 0;
}

int CALLBACK CDirTreeDemoView::CompareFunc (LPARAM lParam1, LPARAM lParam2,LPARAM lParamSort)
{
ITEMINFO* pItem1 = (ITEMINFO*) lParam1;
ITEMINFO* pItem2 = (ITEMINFO*) lParam2;
int nResult = 0;

switch (lParamSort) {

case 0: // File name
nResult = pItem1->strFileName.CompareNoCase (pItem2->strFileName);
break;

case 1: // File size
nResult = pItem1->nFileSizeLow - pItem2->nFileSizeLow;
break;

case 2: // Date and time
nResult = ::CompareFileTime (&pItem1->ftLastWriteTime,
&pItem2->ftLastWriteTime);
break;
}
return nResult;
}

When i debuged lParam1 and lParam2 are getting value as '0'.

Any hekp please

Thanks

Re: Sorting List View

Jose Lamas Rios11-Aug-05 20:50

11-Aug-05 20:50

Silly question, but...

Are you setting lParam when inserting the items in the list?

--
jlr
http://jlamas.blogspot.com/[^]

Re: Sorting List View

SVPG12-Aug-05 0:55

SVPG

12-Aug-05 0:55

This link should help http://www.codeproject.com/buglist/listcontrolsortitemsbug.asp

Re: Sorting List View

David Crow12-Aug-05 3:27

David Crow

12-Aug-05 3:27

When populating the list, are you also calling SetItemData()?

"One must learn from the bite of the fire to leave it alone." - Native American Proverb

MS Word automation

Imtiaz Murtaza11-Aug-05 18:05

Imtiaz Murtaza

11-Aug-05 18:05

I am automating MS-Word from my MFC application. My application can get the number of characters currently in the document, the number of sentences, praragraphs e.t.c. For these statistics, various functions are exposed by the Word Automation interface like GetCharCount(), GetWordCount() e.t.c

I want to find out that how many characters in the document are in bold and how many characters are in italics. Is there any way to calculate these values ?? What i am thinking is to iterate each character, but i also donn't know that how can we iterate each character of the document.

Imtiaz

Re: MS Word automation

Jose Lamas Rios11-Aug-05 18:35

help needed VC++ with MS Word

11-Aug-05 18:35

I don't know about the automation part, but in MS Word you can search with wildcards and format, so if you can automate that, instead of iterating through each character you could specify a search for [*, use wildcards, bold] and repeat the search counting the hits.

--
jlr
http://jlamas.blogspot.com/[^]

Barm11-Aug-05 15:48

Barm

11-Aug-05 15:48

I am in the mist of editing a legacy program which output the report to words format. I am require to add in images, but I am unable to set the position of the images. I am able to add the images but all at (0,0) range.

i'm using the following codes

_Document oDoc;
Shapes oShape;
oShape = oDoc.GetShapes();
oShape.AddPicture
// v is suppose to be the indicator of the top and left points
tagVARIANT v;
v.lVal = v.intVal = v.iVal = v.fltVal = 200;
("C:\\Logo.JPG",vtFalse,vtTrue,&v,&v,vtOptional,vtOptional,vtOptional);

the image still appear at point (0,0)

Is it correct to use Shapes class or should I use InlineShapes Confused | :confused:

can someone please advise me... where have I gone wrong Confused | :confused:

Thomas

Re: help needed VC++ with MS Word

Jose Lamas Rios11-Aug-05 16:21