From: adalee AT sendit DOT sendit DOT nodak DOT edu (Adam W Lee)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Problem with fstreams...
Date: 24 Aug 1997 19:30:18 GMT
Organization: SENDIT - North Dakota's Educational Network
Lines: 47
Message-ID: <5tq24a$b6$1@news.sendit.nodak.edu>
References: <5tps7b$rpo$1 AT news DOT sendit DOT nodak DOT edu>
NNTP-Posting-Host: sendit-2.sendit.nodak.edu
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp
Precedence: bulk

Adam W Lee (adalee AT sendit DOT sendit DOT nodak DOT edu) wrote:
: I'm trying to write a program to read a file and write it to another file
: in C++, but my program quits like halfway through the file with a read
: error or something to that effect...  Here's some pseudo-code.

OK, now the plot thickens :)  This program works perfectly under
BSDi/OS...  Here's the actual code:


#include <fstream.h>
 
int main(int argc, char *argv[])
{
  char temp[1025];
  if(argc<3)
  {
    cout << "Usage: " << argv[0] << " <infile> <outfile>" << endl;
    return 1;
  }
  ifstream in(argv[1]);
  if(in.fail())
  {
    cout << "Error opening " << argv[1] << endl;
    return 2;
  }
  ofstream out(argv[2]);
  if(out.fail())
  {
    cout << "Error opening " << argv[2] << endl;
    return 3;
  }
  while (!in.eof()&&!in.fail()&&!out.fail())
  {
    in.read(&temp,1024);
    out.write(&temp,in.gcount());
  }
  out.flush();
  if(in.eof())
    cout << "End of file reached." << endl;
  if(in.fail()&&!in.eof())
    cout << "Error reading " << argv[1] << "." << endl;
  if(out.fail())
    cout << "Error writing " << argv[2] << "." << endl;
  in.close();
  out.close();
  return 0;
}