Hi, in that Number::Compare module there is the pl file named makefile.pl is used to build the module.
if u r not clear pls follow the below steps for installation process.

If you're running Windows 95 or NT with the core Windows distribution of Perl,

A. DECOMPRESS

When you download the module, make sure it ends in either .tar.gz or .zip. Windows browsers sometimes download .tar.gz files as _tar.tar, because early versions of Windows prohibited more than one dot in a filename.

You can use WinZip (shareware) to decompress and unpack modules.

Or, you can use InfoZIP's unzip utility to uncompress .zip files; type unzip yourmodule.zip in your shell.

Or, if you have a working tar and gzip, you can type

gzip -cd yourmodule.tar.gz | tar xvf -

in the shell to decompress yourmodule.tar.gz. This will UNPACK your module as well.

B. UNPACK

All of the methods in DECOMPRESS will have done this for you.

C. BUILD

Go into the newly-created directory and type:

perl Makefile.PL

dmake

dmake test

Depending on your perl configuration, dmake might not be available. You might have to substitute whatever perl -V:make says. (Usually, that will be nmake or make.)

D. INSTALL

While still in that directory, type:

dmake install