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written assignment1 we are interested in looking at the balance in a bank account after looking at all the deposits and
in ac as in many computer languages variables are considered uninitialized after they are declared a variable needs to
extend the ac scanner figure 25 so that the following occursa a floatdcl can be represented as either f or float that
let d be any deterministic finite automaton assume that you know d contains exactly n states and that it accepts at
10-701 machine learning - spring 2012 - problem set 4q1 bayesian networks 11 independence-in this question we analyze
let s be a string define inserts to be the function that inserts a ne into each possible position in s if s is n
let f be any nfa that contains lambda transitions write an algorithm that transforms f into an equivalent nfa f that
let allbutlast be a function that returns all of a string but its last character for example allbutlastabc ab
let seq x y be the set of all strings of length 1 or more composed of alternating xamp39s and yamp39s for example seq a
let double be the set of strings defined as s s nbspww double contains only strings composed of two identical repeated
write a lex program that examines the words in an ascii file and lists the ten most frequently used words your program
write lex regular expressions using character classes if you wish that match the following sets of stringsa the set of
you have scanned an integer literal into a character buffer perhaps yytext you now want to convert the string
prove that the dfa constructed by makedeterministic in section 372 is equivalent to the original nfa to do so you must
let rev be the operator that reverses the sequence of characters within a string for example revabc cba let r be any
assume e is any regular expression e represents the set of all strings not in the regular set defined by e show that e
translation of a regular expression into an nfa is fast and simple creation of an equivalent dfa is slower and can lead
you are to design the ultimate programming language utopia 2010 you have already specified the languageamp39s tokens
unlike c c and java fortran generally ignores blanks and therefore may need extensive look ahead to determine how to
most compilers can produce a source listing of the program being compiled this listing is usually just a copy of the
when a compiler is first designed and implemented it is wise to concentrate on correctness and simplicity of design
define a token class almost reserved to be those identifiers that are not reserved words but that would be if a single
the algorithms in figures 48 and 411 compute firstalpha and followaa modify the algorithm in figure 48 to compute
let g be an unambiguous cfg without lambda-productionsa ifnbspxnbspnbsplg show that the number of steps needed to