Database System Concepts
7th Edition
ISBN: 9780078022159
Author: Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher: McGraw-Hill Education
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Please help me with this question. I am having a hard time understanding what to do. Please complete the question in the image below. What are the post and preconditions
Thank you
Transcribed Image Text:Ex 5) This exercise uses sub-algorithms. Trace the algorithm when input value is 4 and
complete the trace tables. Also note that there are two variables named num. One is in the
main algorithm and another is the sub-algorithm. Write pre- post-conditions for each of
these algorithms (the main one and the sub-algorithm).
num
output
start
num
i42
is num
i+i+1
prime()=true
end
F
prime(num)
start
num
flag-true
d+2
flag true and
dsnum/2
num mod d = 0
flag-false
d+d+1
ret flag
Flag
returned value
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