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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
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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;
ifstream myfile ("example.txt");<br />
if (myfile.is_open())
{<br />
while (! myfile.eof() )
{<br />
getline (myfile,line);
cout << line << endl;
}<br />
myfile.close();
}<br />
<br />
else cout << "Unable to open file";
<br />
return 0;
}<br />
<br />
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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
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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
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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
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How could I have overlooked that while() loop?
A very stupid human error...
Well, I'm a novice for something, eh?
Thanks, David!
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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
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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.
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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.
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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
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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
{
...
}
}
"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
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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
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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
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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?
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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.
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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
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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
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I'm sure someone has posted such a thing on what we call 'the internet'.
Frankly, I don't thing anyone's going to send you something like that, but
if you're smart you would try such a program yourself and then ask us
how to fix wherever you get stuck.
That might help getting where you want to get.
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mechalien wrote: plz can someone send me the code for a working chat at TREEMinceMeat@hotmail.com
buddy.. thats not easy task!...
"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
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MSDN has a sample program, CHATSERVER which has code and shows you how to do it.
Cheers,
- Ed.
--------------------------------
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I would appreciate any information someone might have on how to save the console's output buffer so that I can have another screen temporarily display it's contents and then restore the former contents as though nothing happened. I would prefer any code or class references to be ANSI (Dev c++ compatible) but I will take any kind of suggestions anyone can offer. Thank you greatly!
sincerely, Brett Peirce - PolerBear
To err is human; To forgive: divine.
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When you create the child process (i.e., CreateProcess()), just redirect its standard output handle. See here and 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
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Thanks for the idea.
I am hesitant to go that route for a few reasons, though. I was hoping that it would be possible to accomplish without using windows.h and other such things - hoping for pure console-type code. Aside from that, though, I haven't used handles or child processes or a few other things in that code before, and it's very daunting to look at it and challenging to understand it.
Would you have any other ideas or a link to some reading material that might help me understand all that a little better? Also: I noticed the use of printf() in that code. Is it possible to use streams (cout and cin) or at least getch() and such with that code? I appreciate your time and knowlege.
sincerely, Brett Peirce - PolerBear
To err is human; To forgive: divine.
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