Question

A special two-digit number is such that when the sum of its digits is added to the product of its digits, the result is equal to the original two-digit number. Example: Consider the number 59.
Sum of digits = 5 + 9 = 14
Product of its digits = 5 x 9 = 45
Sum of the sum of digits and product of digits = 14 + 45 = 59
Write a program to accept a two-digit number. Add the sum of its digits to the product of its digits. If the value is equal to the number input, output the message “Special 2-digit number” otherwise, output the message “Not a special 2-digit number”

Answer 1

import java.io.*;
class Special
{
     int num, sum=0, pro=1, finalsum=0;
     void accept ( ) throw IOException
         {
         InputStreamReader IR=new InputStreamReader (system.in);
         BufferefReader br = new bufferedReader (IR);
         System.out.println("Enter any two-digit number:");
         num = Integer.parseInt (br.readLine ( ) );
         }
         void computer ( )
         {
               int digit, n = num;
               while (num ! = 0)
               {
                     digit = num% 10;
                     sum = sum + digit;
                     pro = pro * digit;
                     num = num/10;
              }
              finalsum = sum + pro;
              if (finalsum = = n)
              {
              system.out.println("Special 2-digit number");
              }
              else
              {
                    system.out.println("Not a special 2-digit number");
              }
}
              public static void main ( ) throws IOException
{
               special obj = new special ( );
                        obj.accept ( );
                        obj.computer ( );
              }
}

The variable description is as follows:

S.No.	Variable Name	Data type	Purpose
1.	num	int	to enter the 2-digit number
2.	sum	int	to store sum of the digits
3.	pro	int	to store product of digits
4.	final sum	int	to store sum of “sum and product of the digits”.
5.	IR	—	for input stream Reader
6.	hr	—	for buffered Reader
7.	digit	int	to store remainder, i.e. each digit
8.	n	int	to store the 2-digit number
9.	obj	—	for object of the class

Answer 2

import java.util.*; 
public class Q3 
{public static void main(String args[]) 
{Scanner ob = new Scanner(System.in); 
int num, rd, ld, pdt, sum = 0; 
System.out.println("Enter a two digit number"); 
num = ob.nextInt();
rd = num % 10; 
ld = num / 10; 
pdt = rd * Id; 
sum = rd + ld; 
if (num == (sum + pdt)) 
System.out.println("It is a special 2 digit number"); 
else 
System.out.println("lt is not a special 2 digit number"); 
}}