C / C++ / MFC

2-Mar-06 10:58

See the example here.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

loop processing

ronwurster2-Mar-06 9:51

ronwurster

2-Mar-06 9:51

I have a dialog with several controls in it for several miscellaneous functions. Among them, I created a pushbutton control (function) which, when entered, loops forever processing the following:
opens a file, processes file data, closes the file, sleeps to
allow file access and repeats within the loop.

Once I select the pushbutton to do this, it locks me out from any of the other controls. How can I suspend (etc.) the loop to allow me to tell if another control has been selected and, if so, leave this loop to process the selected control.

Thanks, Ron

Re: loop processing

David Crow2-Mar-06 9:53

2-Mar-06 9:53

ronwurster wrote:
opens a file, processes file data, closes the file,

You need to put this code in a worker thread.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: loop processing

ronwurster3-Mar-06 4:33

ronwurster

3-Mar-06 4:33

Thanks David.

getline from file

Peter Charlesworth2-Mar-06 9:34

2-Mar-06 9:34

hi everyone!

I have a question regarding input and output with files (standard C/C++).
Whenever I use the 'getline' function to get a line from a file and then ask the
program to display that line, it always displays more than a line.
In other words: it doesn't stop 'getting the line' whenever it encounters a
newline.
How can I make sure he reads only one line and no more?
And how can I tell the program to get a specific line, like line n° 34
or the line that follows the words 'myline:' or whatever?

Thanks in advance!

Peter

The program that's supposed to get one line but gets more then that is this one:

<br />
#include <iostream><br />
#include <fstream><br />
#include <string><br />
using namespace std;<br />
<br />
int main () {<br />
  string line;                      // declare a string named 'line'<br />
  ifstream myfile ("example.txt");<br />
  if (myfile.is_open())             // if the file is open, then...<br />
  {<br />
    while (! myfile.eof() )         // while the end of the file is NOT reached...<br />
    {<br />
      getline (myfile,line);        // get a line from the file and put it in the string 'line'<br />
      cout << line << endl;         // output the contents of 'line' to the screen<br />
    }<br />
    myfile.close();                 // close the file   <br />
  }<br />
<br />
  else cout << "Unable to open file";    // if the file can't be opened, display "Unable to open file<br />
<br />
  return 0;                         // close the program<br />
}<br />
<br />

David Crow2-Mar-06 9:52

2-Mar-06 9:52

Peter Charlesworth wrote:
Whenever I use the 'getline' function to get a line from a file and then ask the
program to display that line, it always displays more than a line.

What do you mean? I tried your code verbatim and it worked fine.

Peter Charlesworth wrote:
In other words: it doesn't stop 'getting the line' whenever it encounters a
newline.

It did for me. What was printed to the console window looked exactly like the contents of the file.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Peter Charlesworth2-Mar-06 9:57

2-Mar-06 9:57

Well, what I'm trying to accomplish is this:

Suppose a file named "example.txt" has this as content:

<br />
This is line one.<br />
This is the second line.<br />
As you can guess, this is the third line.<br />

And i run the program i mentioned above, then it would output this:

<br />
This is line one.<br />
This is the second line.<br />
As you can guess, this is the third line.<br />

But it's supposed to output this:

<br />
This is line one.<br />

Getline... Get one line and then execute the next piece of code, but instead
it gets the contents of the entire file.

I use Borland C++ 5.5 as my compiler, maybe that my problem is a problem just with my
compiler.

Anyway, thank for responding!

Peter

David Crow2-Mar-06 10:05

2-Mar-06 10:05

So get rid of the while() loop and see what happens. If what you say is true, then a single call to getline()/cout will display the entire file.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Peter Charlesworth3-Mar-06 3:01

embedded VC and activesync problem

3-Mar-06 3:01

How could I have overlooked that while() loop?
A very stupid human error...
Well, I'm a novice for something, eh?
Thanks, David!

neodan2-Mar-06 9:27

neodan

2-Mar-06 9:27

Hi. anyone face this problem?

Downloading files
The Microsoft ActiveSync connection server has failed.
Please make sure Microsoft ActiveSync is running and retry the download by Rebuild All or Update Remote Output File(s).
Also make sure that you have selected the correct platform.
Failed downloading.

It seem that this problem was not new when i google this problem but no solution was given. Hope some kind souls will shed some light on this matter. =)

Cheers
dan

ps: btw i using the code from the code project as a sample view
Pocket PC 2003 Filetransfer - The OBEX way
By MBuehrer

Re: embedded VC and activesync problem

Mauro Leggieri2-Mar-06 16:11

Mauro Leggieri

2-Mar-06 16:11

I had a similar problem when my old McAffee antivirus was active. It took a long time to scan the pocket pc (?) and dropped the activesync connection.

Best regards,
Mauro.

Re: embedded VC and activesync problem

neodan2-Mar-06 21:15

neodan

2-Mar-06 21:15

thx. it nt the anti virus. i solve the problem. the device OS i using is Pocket PC 2002 while my embedded VC is using Pocket PC2003 SDK. so when i use another with Pocket PC2003 OS, it work.

cheers
dan.

integer/ character

cuteee2-Mar-06 7:20

cuteee

2-Mar-06 7:20

I have a long string.
-c:Tow:UDOP,0.2:dN:dE,0.005:L1P Sats,3

I have put this whole string in a CArray<cstring, cstring=""> csaColumns.

Now i need to seperate out the numbers from this array.

I want to do something like this.
for(i=0; i

Re: integer/ character

David Crow2-Mar-06 7:51

2-Mar-06 7:51

How about:

CString str = "-c:Tow:UDOP,0.2:dN:dE,0.005:L1P Sats,3";
for (int x = 0; x < str.GetLength(); x++)
{
    if (isdigit(str[x]))
    {
        ...
    }
    else // it must be a character
    {
        ...
    }
}

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

Re: integer/ character

cuteee2-Mar-06 8:07

cuteee

2-Mar-06 8:07

As you said, I am trying to do the following

int nLimit;
CString csChar;
for(int n=0;n < csaColumns.GetSize();n++)
{
if(isdigit(csaOutputColumns.GetAt(n)))
nLimit = atoi(csaOutputColumns.GetAt(n));
else
csChar = csaOutputColumns[n];
}

But i have an error: error C2664: 'isdigit' : cannot convert parameter 1 from 'class CString' to 'int'
No user-defined-conversion operator available that can perform this conversion, or the operator cannot be called
Error executing cl.exe.

What do you think might be going wrong?

-- modified at 14:09 Thursday 2nd March, 2006

Re: integer/ character

David Crow2-Mar-06 8:24

Calling .exe withing project.

2-Mar-06 8:24

GetAt() returns a CString object, but isdigit() is expecting a single char/int. You need to also use the [] operator.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

CodeGoose2-Mar-06 6:59

CodeGoose

2-Mar-06 6:59

Hello. I'm curious how you call an executable from within a VC project? So I have a .exe that i want to call to generate some files from within my program. Would like to be able to do something like this:

void Do ()
{
Call ("foo.exe", "command line args") ;
}

How do I do this? Is there a windows equivalent or similar?
I need to pass it command line arguments.
Thoughts?

Re: Calling .exe withing project.

Brett Peirce2-Mar-06 7:10

Brett Peirce

2-Mar-06 7:10

ANSI standard c++ for console programs would be system("foo.exe command line args");. I would assume that it would be valid for use in VC++.

sincerely, Brett Peirce - PolerBear
To err is human; To forgive: divine.

Re: Calling .exe withing project.

David Crow2-Mar-06 7:47

2-Mar-06 7:47

Use CreateProcess() or ShellExecute(). WinExec() can be used for 16-bit systems, and system() is an antiquated function brought over from Unix.

"Let us be thankful for the fools. But for them the rest of us could not succeed." - Mark Twain

"There is no death, only a change of worlds." - Native American Proverb

help plz

mechalien2-Mar-06 6:43

mechalien

2-Mar-06 6:43

hi plz can someone help me

plz can someone send me the code for a working chat at TREEMinceMeat@hotmail.com

help me plz

-- modified at 12:44 Thursday 2nd March, 2006

Re: help plz

Maximilien2-Mar-06 6:52

Maximilien

2-Mar-06 6:52

no, seriously ...

Laugh | :laugh:

Maximilien Lincourt
Your Head A Splode - Strong Bad

Re: help plz

Peter Charlesworth2-Mar-06 9:40