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Old 09-13-2003, 02:30 PM   #1
rajorshi
Member
 
Registered: Jun 2003
Location: Calcutta, India
Distribution: Slackware 9.0
Posts: 34

Rep: Reputation: 15
c++ file i/o programming help needed


Hi all,
I'm new to standard C++. I seem to have a problem:
Whenever I create a file in Linux (gcc 3.2.2) as follows:

fstream f;
f.open("somefile.dat",ios::app|ios::in|ios::ate);


the file does not get created (f remains null). However
if I use 'touch' to create the file beforehand, it
succeeds. The code above was found in two textbooks
I am referring to.

Am I doing something obviously wrong ? I use Slack 9.0
and was coding in a non-root account.

Please help!
 
Old 09-13-2003, 02:40 PM   #2
kev82
Senior Member
 
Registered: Apr 2003
Location: Lancaster, England
Distribution: Debian Etch, OS X 10.4
Posts: 1,263

Rep: Reputation: 51
your passing the flag ios::in therefore you are opening the file for reading, what would be the point of creating the file because it would be empty. use ios::out if you want to output to the file(creating it if not already present)

Last edited by kev82; 09-13-2003 at 02:41 PM.
 
  


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