File input/output is part of Short Circuit's Console Program Basics selection.
Task

Create a file called   "output.txt",   and place in it the contents of the file   "input.txt",   via an intermediate variable.

In other words, your program will demonstrate:

   how to read from a file into a variable
   how to write a variable's contents into a file


Oneliners that skip the intermediate variable are of secondary interest — operating systems have copy commands for that.




 
-module( file_io ).
 
-export( [task/0] ).
 
task() ->
       {ok, Contents} = file:read_file( "input.txt" ),
       ok = file:write_file( "output.txt", Contents ).
 