There's feof for fopen. But I am using
freopen("in.txt", "r", stdin);
freopen("out.txt", "w", stdout);
What is the equivalent of feof for this?
Asked
Active
Viewed 1,132 times
0
-
1I'm assuming `"w` is a typo and should be `"w"` – Borgleader Jan 23 '20 at 14:25
-
2Why do you think it's different? Be careful with `feof` though. It's true after an attempt to read past the end of file. It doesn't tell you if you are just at the end of file. – lurker Jan 23 '20 at 14:25
-
3There is `foef` "for" `freopen`. In general, there is `feof` for `FILE*`. – KamilCuk Jan 23 '20 at 14:25
-
That would be `feof` – user253751 Jan 23 '20 at 14:29
-
@Borgleader thank you, fixed it. – Casio991ms Jan 23 '20 at 15:26
1 Answers
3
It is the same as when the file was opened with fopen: You use feof.
For example, after freopen("in.txt", "r", stdin);, feof(stdin) will tell you whether you hit the end of "in.txt".
The usual warning about feof applies: feof does not tell you whether you are at the end of the file now - it tells you whether the last thing you tried to do failed because you got to the end of the file. See: Why is “while ( !feof (file) )” always wrong?
user253751
- 57,427
- 7
- 48
- 90