(Palindromes) A palindrome is a number or a text phrase that reads the same backward as for- ward. For example, each of the following five-digit integers is a palindrome: 12321, 55555, 45554 and 11611. Write a program that reads in a five-digit integer and determines whether it’s a palindrome. [Hint: Use the division and modulus operators to separate the number into its individual digits.]

Question

What will be an ideal response?

Answer 1

```
// Determine whether a number is a palindrome.
#include
using namespace std;

int main()
{
int number = 0; // user input number
int digit1; // first digit
int digit2; // second digit
int digit4; // fourth digit; don’t care about third digit
int digit5; // fifth digit
int digits = 0; // number of digits in input
// ask for a number until it is five digits
while ( digits != 5 )
{
cout << "Enter a 5-digit number: "; // prompt for a number
cin >> number; // get number

// verify if number has 5 digits
if ( number < 100000 )
{
if ( number > 9999 )
digits = 5;
else
cout << "Number must be 5 digits" << endl;
} // end if
else
cout << "Number must be 5 digits" << endl;
} // end while

// get the digits
digit1 = number / 10000;
digit2 = number % 10000 / 1000;
digit4 = number % 10000 % 1000 % 100 / 10;
digit5 = number % 10000 % 1000 % 100 % 10;

// print whether the number is a palindrome
if ( digit1 == digit5 )
{
if ( digit2 == digit4 )
cout << number << " is a palindrome!!!" << endl;
else
cout << number << " is not a palindrome." << endl;
}
else
cout << number << " is not a palindrome." << endl;
} // end main
```