Question

Q1.WAP to input any two numbers. Find the unit digits of both numbers. Find out the greatest digit among the two. [5]​

Answer 1

Answer:

// Java program to find next greater 

// number with same set of digits.

import java.util.Arrays;

  

public class nextGreater 

{

    // Utility function to swap two digit

    static void swap(char ar[], int i, int j) 

    {

        char temp = ar[i];

        ar[i] = ar[j];

        ar[j] = temp;

    }

  

    // Given a number as a char array number[], 

    // this function finds the next greater number. 

    // It modifies the same array to store the result

    static void findNext(char ar[], int n) 

    {

        int i;

          

        // I) Start from the right most digit 

        // and find the first digit that is smaller 

        // than the digit next to it.

        for (i = n - 1; i > 0; i--) 

        {

            if (ar[i] > ar[i - 1]) {

                break;

            }

        }

          

        // If no such digit is found, then all 

        // digits are in descending order means 

        // there cannot be a greater number with 

        // same set of digits

        if (i == 0) 

        {

            System.out.println("Not possible");

        } 

        else 

        {

            int x = ar[i - 1], min = i;

              

            // II) Find the smallest digit on right 

            // side of (i-1)'th digit that is greater 

            // than number[i-1]

            for (int j = i + 1; j < n; j++) 

            {

                if (ar[j] > x && ar[j] < ar[min]) 

                {

                    min = j;

                }

            }

  

            // III) Swap the above found smallest 

            // digit with number[i-1]

            swap(ar, i - 1