AW: problems with ifstream using G++ 3.0.3

[Muhammad Ali]

This is a problem with some operating systems implementations. Like on IRIX
I got the same problem and it is a reported problem on IRIX. It took me a
long time to figure out what is wrong. And then I was forced to use two
ifstream variables. I think you can try to look help for your operating
system. May be you can find a better way or some way that you can use one
ifstream again.

Regards
Muhammad Ali

-----Ursprüngliche Nachricht-----
Von: Edwin Chan/Toronto/IBM [mailto:edwinc@ca.ibm.com]
Gesendet: Dienstag, 11. Juni 2002 15:36
An: gcc-help@gcc.gnu.org
Betreff: problems with ifstream using G++ 3.0.3


Once I read to the end of file and close the ifstream, I can't reopen the
ifstream again.

Ex.
in file foo
first
second

in file bar
second
first

in test.cpp
#include <iostream.h>
#include <fstream.h>
using namespace std;

void foo(ifstream &in) {
  while (!in.eof()) {
    char ch;
    in.get(ch);
    cout << ch;
  }
  in.close();
  in.open("bar",ios::ate);
  if (in.eof()) cout << "end of file" << endl;

  while (!in.eof()) {
    char ch;
    in.get(ch);
    cout << ch;
  }
}
int main() {
  ifstream in;
  in.open("foo");
  foo(in);
  return 0;
}

//Result
first
second
end of file