filestream to read and write integer numbers

Hi,

I wrote a small program, which uses filestream to read and write integer numbers. The segment of code is as following:

int i, j;
while (!from.eof()) { // from is the input file
from >> i >> j;
std::cout << i <<j;
}

The input file includes int numbers 1 2 3 4. I expected that the output is 1 2 3 4. But it turns out to be 1 2 3 4 3 4.
I can't figure out why it produces wrong result. Can someone give some ideas?

Thanks!

Because eof() does not become true until you actually try reading past
the EOF (not after the last read).

Normally, you do not even check for eof() ...

Code:

---

while (from >> i >> j)
{
  std::cout << i <<j;
}

---

Hi Philip,

It works. Thanks!

Jianhttp://www.codeguru.com/forum/newreply.php?do=newreply&noquote=1&p=2020317