Write a function in C++ that displays a random N-digit number. Your function should get each digit using the function you wrote for the previous problem. The number of digits N should be supplied as an argument. The solution defines functions to determine the length of an integer and check if an integer is a palindrome. It takes user input for a number, calls the length function, and then calls the palindrome check function to determine if the number is a palindrome or not.

1. Write a function in C++ that displays a random N-digit number. Your function should get each
digit using the function you wrote for the previous problem. The number of digits N should be
supplied as an argument.
Solution
#include <iostream>
#include <string>
#include <cctype>
#include <cmath>
using namespace std ;
int length (int) ;
bool isNumPalindrome (int) ;
int main ()
{
int num , digits = 0 ;
cout << "Enter an integter : " ;
cin >> num ;
length (num) ;
cout << "The number of digits in your integer is " << digits << endl ;
isNumPalindrome (num);
if ( isNumPalindrome (num) == 1 )
cout << "It is a Palindrome" << endl ;
else
cout << "It is not a Palindrome" << endl ;
return 0 ;
}

2. int length ( int num )
{
int digits = 0 ;
if ( num == 0 )
digits = 1;
while ( num != 0 )
{
digits++ ;
num = num / 10 ;
}
return digits ;
}
bool isNumPalindrome(int num)
{
int pwr = 0;
if(num < 10)
return true;
else
{
while(num / static_cast<int>(pow(10,pwr)) >= 10)
pwr++;
while(num >= 10)
{
if((num / static_cast<int>(pow(10,pwr))) != (num % 10))
return false;
else
{
num = num % static_cast<int>(pow(10,pwr));
num = num / 10;
pwr = pwr - 2;
}
}
return true;
}
}