Use C$++$ languge to code

Implement the ls command to mimic its behavior in the FreeBSD operating system. LS$(1)$

utility is used to list directory contents. For each operand that names a file of a type other than a

directory, ls displays its name and any requested associated information. For each operand that options are available:

$-$A Include directory entries whose names begin with a dot $(`.\text{'})$

except for $.$ and $...$ Automatically set for the super$-$user un$-$

less $-$I is specified. $-$D format

When printing in the long $(-$l$)$ format, use format to format the

date and time output. The argument format is a string used by

strftime$(3).$ Depending on the choice of format string, this

may result in a different number of columns in the output.

This option overrides the $-$T option. This option is not de$-$

fined in IEEE Std $1003\mathrm{.}1-2008("$POSIX$\mathrm{.}1").$

$-$L If argument is a symbolic link, list the file or directory the

link references rather than the link itself. This option can$-$

cels the $-$P option.

$-$S Sort by size $($largest file first$)$ before sorting the operands

in lexicographical order.

$-$a Include directory entries whose names begin with a dot $(`.\text{'}).$

$-$d Directories are listed as plain files $($not searched recur$-$

sively$).$

$-$l $($The lowercase letter "ell".$)$ List files in the long format,

as described in the "The Long Format" subsection below.

$-$s Display the number of blocks used in the file system by each

file. Block sizes and directory totals are handled as de$-$

scribed in "The Long Format" subsection below, except $($if the

long format is not also requested$)$ the directory totals are not

output when the output is in a single column, even if multi$-$

column output is requested.