C / C++ / MFC

can scanf retain leading whitespaces

14-Apr-10 2:11

Fareed Rizkalla wrote:
It was because I removed the SUCCEEDED micro, but I can't believe the errors it gave me.

The SUCCEEDED macro did not cause errors to your code. How could it:

#define SUCCEEDED(Status) ((HRESULT)(Status) >= 0)

"One man's wage rise is another man's price increase." - Harold Wilson

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

"Man who follows car will be exhausted." - Confucius

b-rad31113-Apr-10 6:23

13-Apr-10 6:23

Hello,

Can scanf be set to retain leading whitespaces in between words?

For example, if the string was " Hello everyone, how are you today? "

can scanf grab " Hello" " everyone," " how" " are" " you" " today?"

Thanks,

David Crow13-Apr-10 6:43

13-Apr-10 6:43

Only if you wrote your own parser. The other ideas that I mentioned to you would use the space as the delimiter.

b-rad31113-Apr-10 7:45

13-Apr-10 7:45

thanks.

«_Superman_»13-Apr-10 6:58

«_Superman_»

13-Apr-10 6:58

You can do this to capture everything till the enter key is hit.

scanf("%[^\n]", sz);

«_Superman_»
I love work. It gives me something to do between weekends.

Microsoft MVP (Visual C++)

b-rad31113-Apr-10 8:11

13-Apr-10 8:11

thanks .

using sscanf in a loop

b-rad31113-Apr-10 5:25

13-Apr-10 5:25

Hi,

How can I advance the sscanf statement to read each word in the sentence? Right now my output is an endless loop of "This".

CString incoming_line="This is my example incoming line.";
CString string_out;
while (sscanf(incoming_line, "%s", string_out )==1)
{
    cout<<string_out<<endl;
}

Thanks!

C^hris L^osinger13-Apr-10 5:31

13-Apr-10 5:31

you could do something like this:

int offset = 0;
while (sscanf(incoming_line + offset, "%s", string_out )==1)
{
    cout<<string_out<<endl;
    offset += strlen(string_out);
}

b-rad31113-Apr-10 5:49

13-Apr-10 5:49

Chris,

Thanks for your help.

I'm getting the following error when I use your suggestion.

Error	2	error C2666: 'ATL::CStringT<BaseType,StringTraits>::operator +' : 3 overloads have similar conversions

Any ideas?

Thanks,

C^hris L^osinger13-Apr-10 5:56

13-Apr-10 5:56

oops. didn't see the CString there.

David Crow13-Apr-10 5:52

13-Apr-10 5:52

b-rad311 wrote:
while (sscanf(incoming_line, "%s", string_out )==1)

You cannot use a CString object in this capacity.

b-rad31113-Apr-10 5:53

13-Apr-10 5:53

Hi David,

Should I use "const char*" instead?

David Crow13-Apr-10 5:58

static text color and backgroung color

13-Apr-10 5:58

If you did, then how would scanf() be able to change its contents?

Since you are using MFC, have a look at CStringT::Tokenize() or AfxExtractSubString().

D.Manivelan13-Apr-10 4:14

D.Manivelan

13-Apr-10 4:14

Hi friend,
How to change static text color and backgroung color, please help me.

Thanks and Regards,
D.Manivelan

Re: static text color and backgroung color

David Crow13-Apr-10 4:52

Geting the calling modules names

13-Apr-10 4:52

Member 4482742 wrote:
How to change static text color and backgroung color...

Are you referring to WM_CTLCOLOR or one of its variants?

Mugiwara13-Apr-10 3:39

Mugiwara

13-Apr-10 3:39

I'am hooking the sendto function and i would like to log names of every DLL/prog which call it.

How can i retrieve the names of the DLLs which call to the sendto hooked function ?

Re: Geting the calling modules names

Eugen Podsypalnikov13-Apr-10 4:40

Eugen Podsypalnikov

13-Apr-10 4:40

You could insert GetModuleFileName(NULL, ..) into your hook function Smile | :)

virtual void BeHappy() = 0;

Re: Geting the calling modules names

Mugiwara13-Apr-10 9:15

Mugiwara

13-Apr-10 9:15

I already made a try with this method but it id not work.
The returned name's module is the one of the *.EXE which loaded the DLL, but not the DLL's name itlsef(DLL which makes calls).

Re: Geting the calling modules names

David Crow13-Apr-10 9:50

If the data is static, how can you access that data in another file ?

13-Apr-10 9:50

Call GetModuleFileName() with the HINSTANCE that was passed to your DllMain() function. That said, I do not believe GetModuleFileName() is what you are after.

krish_kumar13-Apr-10 2:54

krish_kumar

13-Apr-10 2:54

Hello

Question : Differentiate static and extern ? If the data is static, how can you access that data in another file ?

My answer is :
The static keyword allows a variable to maintain its value among different function calls. Extern says the variable, or function, is defined outside this source file.

main.h
--------

#include <>

static int x;

main.c
--------
#include "main.h"

int main(void) {
printf("\n x is %d", x);
return 0;
}

My answer is sufficient or partially or wrong ...? Give me an advise ?

Thanking you.

Re: If the data is static, how can you access that data in another file ?

C^hris L^osinger13-Apr-10 3:11

13-Apr-10 3:11

its partially correct.

'static' has multiple meanings. you've mentioned one, but there is another meaning that is more closely related to 'extern'.

Re: If the data is static, how can you access that data in another file ?

krish_kumar13-Apr-10 3:46

krish_kumar

13-Apr-10 3:46

Could you elaborate it , please?

Re: If the data is static, how can you access that data in another file ?

C^hris L^osinger13-Apr-10 3:47

http://lmgtfy.com/?q=static+function+C[^]

13-Apr-10 3:47