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Software Engineering (10th Edition)
10th Edition
ISBN: 9780133943030
Author: Ian Sommerville
Publisher: PEARSON
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Chapter 14, Problem 14.2E
Program Plan Intro
Ability of system:
The number of cyber-attacks and even the complexity of the attacks have been increasing gradually. It is very important to increase the ability of the system so as to protect the system from cyber-crime. In order to protect the system against cyber-attack, redundancy and diversity play very important role.
Expert Solution & Answer
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7. See the code below and solve the following.
public class Test {
public static void main(String[] args) {
int result = 0;
}
result = fn(2,3);
System.out.println("The result is:
+ result);
// fn(x, 1) = x
// fn(x, y)
=
fn(x, y-1) + 2, when y>1
public static int fn(int x, int y) {
if (x <= 1)
return x;
else
return fn(x, y-1) + 2;
}
}
7-1. This program has a bug that leads to infinite recursion. Modify fn(int x, int y) method to fix
the problem. (2 point)
7-2. Manually trace the recursive call, fn(2,3) and show the output (step by step). (2 point)
7-3. Can you identify the Base Case in recursive method fn(int x, int y)? (1 point)
Knowledge Booster
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