Classify an IP address, get network address, and related information (CLI).
Run this on: OnlineGDB
$ clang main.cxx
$ ./a.out
# Enter IP address: 192.168.1.20
# IP Address: 192.168.1.20
# Class: C
# Enter subnet mask: 255.255.255.0
# Subnet Mask: 255.255.255.0
# Network Address: 192.168.1.0
# Broadcast Address: 192.168.1.255
# First IP Address: 192.168.1.1
# Last IP Address: 192.168.1.254
# Enter second IP address: 192.168.2.20
# Second IP Address: 192.168.2.20
# IP addresses are in different networks.
# 192.168.1.20 is private.
# 192.168.2.20 is private.
