Lesson 14 Activity 3

/*
 * Lesson 14 Coding Activity 3
 * The Internet runs on web addresses.The addresses we type represent the IP address
 * for each site and how the computer finds an individual web page.
 *
 * IP addresses are made up of four numbers, each between 0 and 255 separated by a period.
 * For example, 128.253.21.58 is an IP address.
 *
 * Write a program to enter four numbers and test if they make up a valid IP address.
 * In other words, test to see if the numbers entered are between 0 and 255 inclusive.
 *
 *     Sample Run 1
 *         Please enter the first octet:
 *         898
 *         Please enter the second octet:
 *         34
 *         Please enter the third octet:
 *         712
 *         Please enter the fourth octet:
 *         45
 *         Octet 1 is incorrect
 *         Octet 3 is incorrect
 *
 *
 *      Sample Run 2
 *         Please enter the first octet:
 *         112
 *         Please enter the second octet:
 *         200
 *         Please enter the third octet:
 *         0
 *         Please enter the fourth octet:
 *         254
 *         IP Address: 112.200.0.254
 *
 */


import java.util.Scanner;

class Lesson_14_Activity_Three {
    public static void main(String[] args)
     {
      Scanner scan = new Scanner(System.in);
      System.out.println("Please enter the first octet:");
      int a = scan.nextInt();
      System.out.println("Please enter the second octet:");
      int b = scan.nextInt();
      System.out.println("Please enter the third octet:");
      int c = scan.nextInt();
      System.out.println("Please enter the fourth octet:");
      int d = scan.nextInt();
      boolean ip = true;
      if (!(a >= 0 && a <= 255))
      {
        System.out.println("Octet 1 is incorrect");
        ip = false;
      }
       if (!(b >= 0 && b <= 255))
      {
        System.out.println("Octet 2 is incorrect");
        ip = false;
      }
        if (!(c >= 0 && c <= 255))
      {
        System.out.println("Octet 3 is incorrect");
        ip = false;
      }
         if (!(d >= 0 && d <= 255))
      {
        System.out.println("Octet 4 is incorrect");
        ip = false;
      }
         if (ip == true)
           System.out.println("IP Address: " + a + "." + b + "." + c + "." + d);
    }
}