Menu driven program to accept a number from the user and check * whether it a BUZZ number or to accept any two numbers & print GCD of them - ICSE BOARD QUESTION 2009

/**

 * Write a menu driven program to accept a number from the user and check

 * whether it a BUZZ number or to accept any two numbers & print GCD of them.

 */

import java.io.*;
class questionEIGHT2009
{
    public static void main(String args[]) throws IOException
    {
        int i,j;
        BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
        System.out.println("**************MENU*************");
        System.out.println("Type 1 to check if a number is a BUZZ number or not");
        System.out.println("Type 2 to print GCD of any two numbers");
       
        System.out.println("Enter your choice");
        int ch=Integer.parseInt(br.readLine());
       
        switch(ch)
        {
            case 1:
            System.out.println("Enter the number to check if it is buzz number or number");
            int n=Integer.parseInt(br.readLine());
           
            if(n%7==0 || n%10==7)
            {
                System.out.println("The number " +n+ " is a BUZZ number");
            }           
            else
            {
                System.out.println("The number " +n+ " is NOT a BUZZ number");
            }
            break;
           
            case 2:
            System.out.println("Enter any two numbers to print their GCD");
            int n1=Integer.parseInt(br.readLine());
            int n2=Integer.parseInt(br.readLine());
           
            int divisor, dividend;
            if(n1>n2)
            {
                dividend=n1;
                divisor=n2;
            }
            else
            {
                dividend=n2;
                divisor=n1;
            }
           
            int rem=1;
            while(rem!=0)
            {
                rem=dividend%divisor;
                if(rem==0)
                {
                    System.out.println("GCD is = " +divisor);
                }
                else
                {
                    dividend=divisor;
                    divisor=rem;
                }
            }
            break;
           
            default:
            System.out.println("Wrong choice");
        }
    }
}