Schrodinger's fish

This is combination of Deadfish and Alivefish, invented by User:BestCoder, capacitated to operate on integers as well as complex numbers, and extended by a numeric input facility.

Command	Description
s	Square
S	Square root, also works for negative numbers
i	Increment
I	Integral the previous values and the thing will be that
d	Decrement
D	Double the accumulator
o	Output the accumulator in its verbatim numeric form
O	Query the standard input for a signed integer or a complex number

test programs

Oo #should be cat
ODo #should be double cat, not two letters of cat, but just get number, and double it and output
dSo #should output 0+1i

Interpreter

• Common Lisp implementation of the Schrodinger's fish programming language.