Answered: RT(A, p, q − 1) QUICKSORT(A, q + 1, r)…

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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Question

(CYCLOMATIC/MCCABE COMPLEXITY)

Consider the following quicksort sorting algorithm:

QUICKSORT(A, p, r)

if p < r

then q ← PARTITION(A, p, r)

QUICKSORT(A, p, q − 1)
QUICKSORT(A, q + 1, r)

where the PARTITION procedure is as follows:
PARTITION(A, p, r)

x ← A[r]
i ← p − 1
for j ← p to r − 1

do if A[j] ≤ x

then i ← i + 1

exchange A[i] ↔ A[j]

exchange A[i + 1] ↔ A[r]
return i + 1

Draw the flowchart of the above algorithm.
Draw the corresponding graph and label the nodes as n1, n2, … and edges as e1, e2, …
Calculate the cyclomatic complexity of the above algorithm.

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RT(A, p, q − 1) QUICKSORT(A, q + 1, r) where the PARTI