are "seekp" & "seekg" interchangeable?
binaryfiles, c++, fstream, position
Solution
For file positions they are the same. In other words there is only one pointer maintained.
From `27.9.1.1p3`:
A joint file position is maintained for both the input sequence and the output sequence.
So, `seekg` and `seekp` are interchangeable for file streams. However, this is not true for other types of streams, as they may hold separate pointers for the put and get positions.
Problem
Well I just noticed that by changing the position -in microsoft visual studio- through "seekp" I implicitelly also change the read-position, when handling files. I am wondering however if this is "portable" behaviour? Can I expect the position of reading & writing to be always the same? And consequently: will `tellp` & `tellg` always return the same value?