Software Construction $-$ SE$411$

Semester $202$

Lab $5-$ Best Practices

Determine the bad practices of the following codes if any.

package palindrome;

import java.util.Scanner;

public class Palindrome $\{$

public static void main$($String$[]$ args$)\{$

Scanner i $=$ new Scanner$($

System.in$)$;

System.out.print ln$("$Enter a number: $")$;

int $n=$ i$.$nextInt $()$;

int $r,$ orgInt $=n$;

for $($ ;$n0$;$n=\frac{n}{10})$

$r=n\%10$;

int revint $=$ revint $**10+r$;

if $(!($orgInt $==$ revint$))$

System.out.println$($orgInt $+"$ is not a palindrome."$)$;

if $($orgInt $==$ revint$)$

System.out.println$($orgInt $+"$ is a palindrome."$)$;

$\}$

$\}$

Bad practices:

Rewrite The code:

$1|$ Pag e

Software Construction $-$ SE$411$

Semester $202$

Lab $5-$ Best Practices

package palindrome;

import java.util.Scanner;

public class Palindrome $\{$

public static void main$($String$[]$ args$)\{$

Scanner i $=$ new Scanner$($

System.in$)$;

System.out.print ln$("$Enter a number: $")$;

int $n=$ i$.$nextInt$()$;

int $r,$ orgInt $=n$;

for$($ ;$n0$;$n=\frac{n}{10}$

$r=n\%10$;

int revint $=$ revint $**10+r$;

$\}$

if $(!($orgInt $==$ revint$))\{$

$\}$

System.out.print $ln($orgInt $+"$ is not a palindrome."$)$;

if $($orgInt $==$ revint$)\{$

System.out.print ln$($orgInt $+"$ is a palindrome."$)$;

$\}$

$\}$

$\}$

Bad practices:

Rewrite the code :

$2|$ P ag e

Software Construction $-$ SE$411$

Semester $202$

Lab $5-$ Best Practices

package palindrome;

import java.util.Scanner;

public class Palindrome $\{$

public static void main$($String$[]$ args$)\{$

Scanner input $=$ new Scanner$($

System.in$)$;

System.out.print ln$("$Enter a number: $")$;

int num $=$ input.nextInt $()$;

int remainder, originalinteger $=$ num;

for $($; num $!=0$; num $=$ num $/10)\{$

remainder $=$ num $\%10$;

int reversedinteger $=$ reversedinteger $**10+$ remainder;

$\}$

if $(!($originalinteger $==$ reversedInteger $)\{$

System.out.println$($originalinteger $+"$ is not a palindrome."$)$;

$\}$

if $($originalinteger $==$ reversedinteger$)\{$

System.out.println$($orig$$nalinteger $+"$ is a palindrome."$)$;

$\}$

$\}$

$\}$

Bad practices:

Rewrite Code :

$3|$ Pag e