Assignment name  : brainfuck
Expected files   : *.c, *.h
Allowed functions: write, malloc, free
--------------------------------------------------------------------------------

Write a Brainfuck interpreter program.
The source code will be given as first parameter.
The code will always be valid, with no more than 4096 operations.
Brainfuck is a minimalist language. It consists of an array of bytes 
(in our case, let's say 2048 bytes) initialized to zero, 
and a pointer to its first byte.

Every operator consists of a single character :
- '>' increment the pointer ;
- '<' decrement the pointer ;
- '+' increment the pointed byte ;
- '-' decrement the pointed byte ;
- '.' print the pointed byte on standard output ;
- '[' go to the matching ']' if the pointed byte is 0 (while start) ;
- ']' go to the matching '[' if the pointed byte is not 0 (while end).

Any other character is a comment.

Examples:

$>./brainfuck "++++++++++[>+++++++>++++++++++>+++>+<<<<-]
>++.>+.+++++++..+++.>++.<<+++++++++++++++.>.+++.------.--------.>+.>." | cat -e
Hello World!$
$>./brainfuck "+++++[>++++[>++++H>+++++i<<-]>>>++\n<<<<-]>>--------.>+++++.>." | cat -e
Hi$
$>./brainfuck | cat -e
$