Brainfuck is one of the esoteric programming languages.
This uses only >, <, +, -, ., ,, [ and ]. Other characters are ignore.
| Character | Meaning |
|---|---|
> |
Increment the data pointer |
< |
Decrement the data pointer |
+ |
Increment (increase by one) the byte at the data pointer. |
- |
Decrement (decrease by one) the byte at the data pointer. |
. |
Output the byte at the data pointer. |
, |
Accept one byte of input, storing its value in the byte at the data pointer. |
[ |
If the byte at the data pointer is zero, then instead of moving the instruction pointer forward to the next command, jump it forward to the command after the matching ] command. |
] |
If the byte at the data pointer is nonzero, then instead of moving the instruction pointer forward to the next command, jump it back to the command after the matching [ command. |
Make an executable file.
$ make
From file.
$ echo '+++++++++[>++++++++>+++++++++++>+++>+<<<<-]>.>++.+++++++..+++.>+++++.<<+++++++++++++++.>.+++.------.--------.>+.>+.' > hello.bf
$ ./bf hello.bf
Hello World!
From command line.
$ ./bf '+++++++++[>++++++++>+++++++++++>+++>+<<<<-]>.>++.+++++++..+++.>+++++.<<+++++++++++++++.>.+++.------.--------.>+.>+.'
Hello World!