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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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31
Task/Universal-Turing-machine/Prolog/universal-turing-machine-1.pro Normal file
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turing(Config, Rules, TapeIn, TapeOut) :-
call(Config, IS, _, _, _, _),
perform(Config, Rules, IS, {[], TapeIn}, {Ls, Rs}),
reverse(Ls, Ls1),
append(Ls1, Rs, TapeOut).
perform(Config, Rules, State, TapeIn, TapeOut) :-
call(Config, _, FS, RS, B, Symbols),
( memberchk(State, FS) ->
TapeOut = TapeIn
; memberchk(State, RS) ->
{LeftIn, RightIn} = TapeIn,
symbol(RightIn, Symbol, RightRem, B),
memberchk(Symbol, Symbols),
once(call(Rules, State, Symbol, NewSymbol, Action, NewState)),
memberchk(NewSymbol, Symbols),
action(Action, {LeftIn, [NewSymbol|RightRem]}, {LeftOut, RightOut}, B),
perform(Config, Rules, NewState, {LeftOut, RightOut}, TapeOut) ).
symbol([], B, [], B).
symbol([Sym|Rs], Sym, Rs, _).
action(left, {Lin, Rin}, {Lout, Rout}, B) :- left(Lin, Rin, Lout, Rout, B).
action(stay, Tape, Tape, _).
action(right, {Lin, Rin}, {Lout, Rout}, B) :- right(Lin, Rin, Lout, Rout, B).
left([], Rs, [], [B|Rs], B).
left([L|Ls], Rs, Ls, [L|Rs], _).
right(L, [], [B|L], [], B).
right(L, [S|Rs], [S|L], Rs, _).

10
Task/Universal-Turing-machine/Prolog/universal-turing-machine-2.pro Normal file
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incrementer_config(IS, FS, RS, B, S) :-
IS = q0, % initial state
FS = [qf], % halting states
RS = [IS], % running states
B = 0, % blank symbol
S = [B, 1]. % valid symbols
incrementer(q0, 1, 1, right, q0).
incrementer(q0, b, 1, stay, qf).
turing(incrementer_config, incrementer, [1, 1, 1], TapeOut).

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Task/Universal-Turing-machine/Prolog/universal-turing-machine-3.pro Normal file
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busy_beaver_config(IS, FS, RS, B, S) :-
IS = 'A', % initial state
FS = ['HALT'], % halting states
RS = [IS, 'B', 'C'], % running states
B = 0, % blank symbol
S = [B, 1]. % valid symbols
busy_beaver('A', 0, 1, right, 'B').
busy_beaver('A', 1, 1, left, 'C').
busy_beaver('B', 0, 1, left, 'A').
busy_beaver('B', 1, 1, right, 'B').
busy_beaver('C', 0, 1, left, 'B').
busy_beaver('C', 1, 1, stay, 'HALT').
turing(busy_beaver_config, busy_beaver, [], TapeOut).