Computers and Technology, 11.03.2020 02:30 emiliogutierrez

Consider the following context free grammar for an arithmetic expression contain- ing operation - only -> number -> - number 1 € (a) The following is an attribute grammar to define the value of any arithmetic expres- sion specified by the grammar above. -> number > .value := .value D. st := number. value -> - number > 2.st : = 1.st - number. value > 1.value : = 2.value -> E > .value := .st Draw a decorated parse tree for 1-2-3-4 using the attribute grammar. (b) Instead of the value of an arithmetic expression, we would like to know the number of "numbers" in an arithmetic expression. For example, in 1-2-3-4, we have four numbers. Write an attribute grammar to define the number of "numbers" of any arithmetic expression following the grammar in part a).

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Consider the following context free grammar for an arithmetic expression contain- ing operation - on...