On Thu, 19 Feb 2009, Pavel Kudrna <pavel.kud...@mff.cuni.cz> wrote:
I have found problem with read and write to file using fstream. The following example opens existing file for read+write, separately writes "Hello" and " world!" and in between it tries to read one character from the file. The problem is that without call to seekg() or tellg() the read fails and without seekp() or tellp() the second write of " world!" to the file fails too. The same program works on linux with gcc 3.2.2.
I'm pretty sure that at least the C standard for stdio said that, between a read and a write (and the reverse), it was necessary to do a seek on the file. But I don't have a citation for that, and I don't know much about C++ I/O to know what rules exist there. I only mention this in case it might prompt someone else who knows where to look. -- Tim McDaniel, t...@panix.com -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/
