modConverter.java

import java.util.Scanner;

/*  irishstorm
    13/12/2015
    Built this because i'm really bad and lazy when it comes to maths, Built with hill 2 cipers in mind.
*/
public class modConverter
{
    public static void main(String[] args)
    {
        Scanner input = new Scanner(System.in);
        int option = 0,
            result = 0,
            mod = 26;
        do
        {
            System.out.println("******** Modulo Converter ********");
            System.out.println("1.\tEnter a number to convert ");
            System.out.println("2.\tChange Mod (26 by Default) ");
            System.out.println("3.\tExit Program ");
            option = input.nextInt();

            switch(option)
            {
                case 1:
                    System.out.print("Enter a number : ");
                    int number = input.nextInt();

                    result = number % mod;

                    if (result < 0)
                        result = result + mod;

                    System.out.print(number + " mod " + mod + " is " + result + "\n\n");
                break;

                case 2:
                    System.out.print("Enter a mod : ");
                    mod = input.nextInt();
                    System.out.print("\n");
                break;

                case 3:
                    System.out.print("Exiting Program...\n\n");
                    System.exit(0);
                break;

                default:
                    System.out.print("Invalid Option - Please select an option 1 - 3.\n\n");
            }
        }
        while(option != 100000);
    }
}