C++ programming question: utf-8 encoding/output&input as text file

[David5956]

I'm using Dev C++ 5.11

as the following link of picture:
http://imgur.com/cSNPlZP

I wonder how can I input 1.txt and convert to 2.txt

then input 2.txt and convert to 1.txt

can anyone help plz?

thank u very much and sorry for my poor English...

[coder777]

So you try to convert an utf-8 text to hex and back.

What did you try so far and where do you stuck?