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COSC450/550 HW 5 Solved

1. Assume the following rules of associativity and precedence for expression:
Precedence Highest *, /, not
+, -, &, mod
-(unary)
=, /=, <. <=, =,
and
Lowest or, xor
Associativity Left to right
Show the order of evaluation of the following expressions by parenthesizing all
subexpressions and placing a superscript on the right parenthesis to indicate order. For
example, for the expression
a + b * c + d
the order of evaluation would be represented as
((a + (b * c)1)2 + d)3
a. a * b – 1 + c
b. a * (b – 1) / c mod d
c. (a – b) / c & (d * e / a – 3)
d. –a or c = d and e
e. a b xor c or d <= 17
f. –a + b
2. Show the order of evaluation of the expressions of the above expressions, assuming that
there are no precedence rules and all operators associate right to left.

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