Write a C++ program to find the factorial of a number

#include < iostream >
using namespace std;
int main()
{
int n, num, digit, rev = 0;
cout << "Enter a positive number: ";
cin >> num;
n = num;
do
{
digit = num % 10;
rev = (rev * 10) + digit;
num = num / 10;
} while (num != 0);
cout << " The reverse of the number is: " << rev << endl;
if (n == rev)
cout << " The number is a palindrome.";
else
cout << " The number is not a palindrome.";
return 0;
}