reading file using fscanf(); - C / C++ / MFC Discussion Boards

Re: Converting big integer value to string

Albert Holguin16-Jan-12 10:15

Albert Holguin

16-Jan-12 10:15

Definitely... but it is worth noting that they can do it themselves if need be.

common language runtime support error for dll

appollosputnik15-Jan-12 17:24

appollosputnik

15-Jan-12 17:24

Dear Friends
I am building an application as dll. Its building with 'no common language runtime support'. But if I build with 'common language runtime support (clr)' then its giving errors. Can u tell me whats going wrong.

Here are the errors 2 linking errors
[code]
Linking...
Creating library C:\Users\sujan.dasmahapatra\Documents\Projects\Bhagavan_SurfaceRevolution\RevolutionProj\Debug\RevolutionProj.lib and object C:\Users\sujan.dasmahapatra\Documents\Projects\Bhagavan_SurfaceRevolution\RevolutionProj\Debug\RevolutionProj.exp
mfcs80ud.lib(dllmodul.obj) : error LNK2005: _DllMain@12 already defined in msvcrtd.lib(dllmain.obj)
C:\Users\sujan.dasmahapatra\Documents\Projects\Bhagavan_SurfaceRevolution\RevolutionProj\Debug\RevolutionProj.dll : fatal error LNK1169: one or more multiply defined symbols found
Build log was saved at "file://c:\Users\sujan.dasmahapatra\Documents\Projects\Bhagavan_SurfaceRevolution\RevolutionProj\RevolutionProj\Debug\BuildLog.htm"
RevolutionProj - 2 error(s), 55 warning(s)
========== Build: 0 succeeded, 1 failed, 0 up-to-date, 0 skipped ==========
[/code]

Re: common language runtime support error for dll

_AnsHUMAN_ 15-Jan-12 18:08

_AnsHUMAN_

15-Jan-12 18:08

How did you create the project? I understand that you have created a native dll and enabling the clr option for the build and that is why the linker error. BTW why do you want to build the with clr enabled?

You talk about Being HUMAN. I have it in my name
AnsHUMAN

Re: common language runtime support error for dll

appollosputnik15-Jan-12 21:04

appollosputnik

15-Jan-12 21:04

yes anshuman i want to build the dll with clr enabled. what can be done ? pls help me..

Re: common language runtime support error for dll

Richard MacCutchan15-Jan-12 21:26

Richard MacCutchan

15-Jan-12 21:26

I'm not sure exactly what the issue is but I suspect you are including a library that should not be part of your DLL. This article[^] has some further suggestions that may help in the conversion process.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: common language runtime support error for dll

appollosputnik15-Jan-12 23:35

appollosputnik

15-Jan-12 23:35

how can make my dll clr support. By just changing the option to clr support is not successfully building. What could be done to make it managed. Its a pure C++ MFC application. Any help would be appreciated...

Re: common language runtime support error for dll

Richard MacCutchan15-Jan-12 23:40

Richard MacCutchan

15-Jan-12 23:40

You cannot convert MFC to CLR just by changing a compiler option; indeed why would you? If you want to make your code into a CLR library then you need to look through all your code to see that it is compliant.
This rather begs the question: exactly what are you trying to achieve?

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

reading file using fscanf();

Raza568015-Jan-12 6:53

Raza5680

15-Jan-12 6:53

Hi,
I have a text file that looks like
0 0:3649 1:1643563 2:563726 3:2358500 4:1706041 5:1399436 6:1021542 7:2612862 8:2399618 9:2177296 10:507745 11:2504905

1 0:2072009 1:1497603 2:886529 3:43699 4:266555 5:1062838 6:429603 7:483804 8:2882799 9:1299756 10:347278 11:13617

2 0:25988 1:1101998 2:1550469 3:1665724 4:1754902 5:1770655 6:484783 7:1933614 8:1314619 9:1026882 10:166341 11:1772168

3 0:2284363 1:2340611 2:1516115 3:880566 4:2554567 5:2119179 6:2787658 7:2699637 8:1572897 9:415096 10:1347549 11:686279

The first element is the line number nad then it is arranged as 'attribute:value'. Due to large number of elements one line of data spans two or more lines of a text file. please note that there are no empty lines I have just done it for clarity.

how to read the first elements of each data line(in this case 0, 1,2 ,3) regardless of the the numebr of lines spanned in the text file

any help will be appreciated

thanks

Re: reading file using fscanf();

David Crow15-Jan-12 16:25

David Crow

15-Jan-12 16:25

Raza5680 wrote:
Due to large number of elements one line of data spans two or more lines of a
text file.

So there are embedded CR/LF characters in some lines, or are you viewing it via something like Notepad that is wrapping long lines for you?

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

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Re: reading file using fscanf();

Chandrasekharan P15-Jan-12 21:00

Chandrasekharan P

15-Jan-12 21:00

Why not check the End Of Line( "\n" ) for each line and then get the first data of each line. You may have to use a while loop for this.

Every new day is another chance to change your life.

Re: reading file using fscanf();

Luc Pattyn15-Jan-12 21:50

Luc Pattyn

15-Jan-12 21:50

when the data is organized in lines, and hence newline characters have special meaning, I find it easiest to read the data one line at the time. In C fgetline() usually does that for me. Once you have an individual line in your hands, you can scanf() it to your heart's content.

Smile | :)

Luc Pattyn [My Articles] Nil Volentibus Arduum

Re: reading file using fscanf();

Raza568016-Jan-12 4:05

Raza5680

16-Jan-12 4:05

Thanks for replies.

in win32api if i want to move between the fields with tab button ? is it possible ?

a1_shay15-Jan-12 5:44

a1_shay

15-Jan-12 5:44

tanks

i try to use WS_TABSTOP , not effect anything

modified 15-Jan-12 12:13pm.

Not enough information

Code-o-mat16-Jan-12 0:21

Code-o-mat

16-Jan-12 0:21

Please try providing a bit more information about your problem, otherwise none will be able to help you.

> The problem with computers is that they do what you tell them to do and not what you want them to do. <
> If it doesn't matter, it's antimatter.<

Re: in win32api if i want to move between the fields with tab button ? is it possible ?

Stephen Hewitt16-Jan-12 2:23

Stephen Hewitt

16-Jan-12 2:23

It will happen automatically for controls on a modal dialog box that have the WS_TABSTOP style. For other windows use the IsDialogMessage[^] function.

Steve

Re: in win32api if i want to move between the fields with tab button ? is it possible ?

a1_shay16-Jan-12 11:44

a1_shay

16-Jan-12 11:44

thanks ,its working

in win32api how i create and use with dll file ?

a1_shay15-Jan-12 5:26

a1_shay

15-Jan-12 5:26

tanks

Re: in win32api how i create and use with dll file ?

Richard MacCutchan15-Jan-12 5:43

Richard MacCutchan

15-Jan-12 5:43

Please give more detail of your problem, this question is not clear.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

how to read only integers from a file with c

reemamjd15-Jan-12 3:01

reemamjd

15-Jan-12 3:01

Im trying to read a file, containing Strings n integers..
please help me to only to read the integers and find the total marks
file contain 10 students names and marks ,each in a line and students name and marks separated by a comma .

eg:
John,89
Katharin,78

F.R.Majeed

Re: how to read only integers from a file with c

venomation15-Jan-12 3:25

venomation

15-Jan-12 3:25

This sounds like a course assignment... Suspicious | :suss:

Think about it logically:
x - Find a way to read the file line by line
x - What could you do when you obtain a line?
x - Is there a way to split the line apart, maybe separate name and mark?
x - When you find a way to separate them, it is simply the case of casting the string to an int and visa versa.

If you get really stuck here is a nice link of tools you could use to help with the string:
http://www.cplusplus.com/reference/string/string/[^]

Re: how to read only integers from a file with c

Richard MacCutchan15-Jan-12 3:34

Richard MacCutchan

15-Jan-12 3:34

venomation wrote:
it is simply the case of casting the string to an int and visa versa.

You cannot cast a string to an int, it must be converted.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: how to read only integers from a file with c

reemamjd15-Jan-12 4:11

reemamjd

15-Jan-12 4:11

@ venomation Confused | :confused:

what u mention above could be done through oop language but i want to know how to do it through C (sop)

Re: how to read only integers from a file with c

Richard MacCutchan15-Jan-12 4:58

Richard MacCutchan

15-Jan-12 4:58

Doing this with C language programming is not difficult; just a few statements.

Unrequited desire is character building. OriginalGriff
I'm sitting here giving you a standing ovation - Len Goodman

Re: how to read only integers from a file with c

David Crow15-Jan-12 16:24

David Crow

15-Jan-12 16:24

Have you considered fscanf()?

Re: how to read only integers from a file with c

reemamjd15-Jan-12 18:45

reemamjd

15-Jan-12 18:45

fp=fopen("SDetails.txt","r+");
while(1)
  {
     ch=fgetc(fp);
      if(ch==EOF)
        break;
        fscanf(fp, "%d", &myInt);
        printf(" %d ",myInt);
        sum=sum+myInt;
  }

printf("%d",sum);
  fclose(fp);

what i did was like above ..but it print the same int 3 times ..i cant find the error...please help

now i can read only ints from the file..thx

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