Deadfish 3

This language is a derivative of Deadfish.

Deadfish 3 is a superset of Deadfish 2 invented by User:A. As well as an accumulator, Deadfish 3 has a string which can be set using the input command.

Commands

Deadfish 3 has twelve commands, three of which are new.

Command	Description
i	Increment the accumulator.
d	Decrement the accumulator.
s	Square the accumulator.
o	Output the accumulator.
O	Output the clipboard.
c	Output the accumulator as a character.
n	Set the accumulator to 0.
r	Read input and store it in the clipboard.
h	Halt the innermost clipboard-pasted program enclosing the program counter (halts the whole program if there is no such program).
"xx"	Copy the characters xx to the clipboard; this is assumed as one command.
@	Paste the content of the clipboard after this command.
:	Execute the next command if the accumulator is 0.

Examples

Hello world!

This program prints "Hello world".

iisiiiisiiiiiiiiciiiiiiiiiiiiiiiiiiiiiiiiiiiiiciiiiiiicciiicdddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddcdddddddddddddddddddddsddcddddddddciiicddddddcddddddddch

Cat program

This program reads the input and copies it to the output.

rOh

Truth-machine approximation

This program remotely approximates the workings of a truth-machine by employing clipboard-pasted code segments and recursion in the same.

In order to operate correctly, the user must simulate a truth-machine input of 0 by issuing no input, or a value of 1 by committing a single i command. Please heed that in Deadfish 3 implementations which realize subprogram executions via recursion a stack overflow is very probable.

"Please input 'i' to simulate '1', otherwise nothing: " O d r@ "iod@" :@ no

Interpreter

• Common Lisp implementation of the Deadfish 3 programming language.