代写MATLAB编程- MATLAB编程代写Design a pushdown automata (PDA)

Posted 2020-10-31 codinghelp168

Design a pushdown automata (PDA)
1.Consider the language of all binary strings that start and end with the same symbol.
(a) Write the production rules of a grammar for this language. Show some derivations to test that your grammar is correct.
(b) Design a pushdown automata (PDA) to recognise this language. Give an implementation level description of your PDA. That is, explain what the
machine will do in plain English.
(c) Draw a diagrammatic state machine model showing all the moves of your PDA.
(d) State carefully any assumptions you have made.
2.Consider the language of arithmetic expressions as a string of additions and/or subtractions of natural numbers. For example, 23 + 6 ? 25 + 0 or
990 or 1 ? 2 are valid expressions.
(a) Outline an implementation-level description of a Turing Machine to recognise this language. Remember that for an implementation-level
description you do not have to give a formal specification of the machine’s moves, but only to explain the algorithm in plain English explaining
the series of steps the machine would use for this calculation.
(b) Draw a diagrammatic state machine model showing all the moves of your Turing Machine.
(c) State carefully any assumptions you have made.
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