Using the output of .tellg() to know the position in the file.
<p>I have a downloaded C++ utility program that dies due to an error while reading an input file. Unfortunately all that it outputs is that "error at offset: 69570744324 in file"; by looking at it's source code, I found that it was actually printing out the .tellg() output there. </p>

<p>I don't quite understand how one can use this offset information constructively to understand the error in the input file. I would greatly appreciate any help. </p>
