Use grep to search for specific lines in a c program utilizing Basic Regular Expressions $($BRE$).$

The grep command should be executed as grep where is the required

regular expression and is a file name. Two files are given for testing: log$3.$c and

log$3.$py$.$ Download the two files and apply the grep commands you will write to them. Some

tasks will involve the two files $($search for patterns in both files simultaneously$),$ in this case, the

grep command must be run as grep $.$

Tasks

$1.$ Write a grep command that will look for single$-$line comments in the both files

$($log$3.$py and log$3.$c$).$

Note:

a$-$ Python single$-$line comments can start with $$#$$ while C single$-$line comments

start with $//$

$.$

b$-$ c$-$ Lines that start with $$#include$$ or $$#define$$ should not be matched.

The matched single$-$comments should start with line; lines has code and end

with a single$-$single line comment should not be matched.

d$-$ To simplify the BRE, you can use Linux pipelining to run two grep commands

back$-$to$-$back where the matched lines by the first grep command are passed as

input to the second grep command lines.

e$-$ You can use the $-$v option in grep to exclude lines that match the BRE instead of

including them. For example, you can have the output from the first grep

command match all lines that start with $$#$$ or $//$ and then exclude those lines

that start with $$#include$$ or $$#define$$ in the second grep command.