How to find the Per-byte sum of a file?

Question

C++ / C#

Hi all. Does anyone know what the Per-byte sum of a file is and how it can be found. Google didn't give an answer. Thanks in advance.

Answer 1

We read data from the file byte by byte into a byte variable of size char or more, while adding them to a variable, for example sum += byte. Preferably into a variable like long long, unsigned long, etc. or in double. If the result is added to double or float, then to reduce accumulation and / or alignment errors, use the Kohan (Kogan) or pairwise summation algorithms (this is just an example).

Answer 2

Maybe they meant it?

perl -le 'use bytes; local $/; $s+=ord $_ for map {split //, $_} <>; print $s' < /path/to/filename