Answer to Question #180162 in C++ for Saiful Islam

Question

Create a class: “Palindrome” with private data members: upper_limit (int), lower_limit (int) and parameterized constructor, which initializes the values of both data members. Apart from initialization, this constructor also displays the count of palindrome numbers from upper_limit to lower_limit. [Example: upper_limit:50, lower_limit:10, count of palindrome numbers is: 4(11 , 22, 33 and 44), also make sure the value of upper_limit should be greater than lower_limit]. 

Answer 1

#include <iostream>
#include <string>


using namespace std;


class Palindrome
{
private:
    int upper_limit;
    int lower_limit;


public:
    bool isPalindrome(int number)
    {
        int reversedNumber = 0;
        string numberToString = to_string(number);


        for(int i = numberToString.size()-1; i >=0; i--)
        {
            reversedNumber*=10;
            reversedNumber+=(int)numberToString[i] - (int)'0';
        }
        return reversedNumber == number;
    }


    Palindrome(int upper_limit, int lower_limit)
    {
        if(upper_limit >= lower_limit)
        {
            this->upper_limit = upper_limit;
            this->lower_limit = lower_limit;


            cout << "upper limit: " << upper_limit << endl;
            cout << "lower limit: " << lower_limit << endl;


            int palindromesCounter = 0;
            for(int number = lower_limit; number <= upper_limit; number++)
            {
                if (isPalindrome(number))
                    palindromesCounter++;
            }
            cout << "count of palindrome numbers is: " << palindromesCounter << endl;
        }
        else
            cout << "upper limit must be greater than lower limit" << endl;
    }
};


int main()
{
    Palindrome palindrome(50,10);
    return 0;
}