a. a * b - 1 + c b. a * (b - 1) / c mod d с. (а - b) / с& (d * e /а - 3) d. -a or c = d and e e. a > b xor c or d <= 17 f. -а + b
a. a * b - 1 + c b. a * (b - 1) / c mod d с. (а - b) / с& (d * e /а - 3) d. -a or c = d and e e. a > b xor c or d <= 17 f. -а + b
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Transcribed Image Text:9. Assume the following rules of associativity and precedence for expressions:
Precedence
Highest
*, 7, not
+
- , &, mod
- (unary)
=, /=, < , <=, >=, >
and
Lowest
or, xor
Associativity
Left to right
Show the order of evaluation of the following expressions by parenthe-
sizing all subexpressions and placing a superscript on the right parenthe-
sis to indicate order. For example, for the expression
a + b *
c + d
the order of evaluation would be represented as
( (а +
(b * c)')² + d)³
а.
a
b
1 + c
b. a
(b
1) / c mod d
с.
(a
b) / с &
(d * е / а - 3)
d. -a
or c = d and e
е. а > b хor c or d <3 17
f. -a + b
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