resetting file pointer

After I reach EOF, how can I change the location of the pointer reading the file? I've tried:
F.seekg(ios::beg);
F.seekg(0,ios::beg);
F.seekg(0);

tellg still returns -1.

Try calling clear() before seekg.

When you hit EOF some of the error flags are set to true and in order to reset those flags,

Quote:

---

Try calling clear() before seekg.

---