C语言练习，检查一个整数是不是回文数

回文数是指正序（从左到右）读和倒序（从右到左）读都是一样的整数。

比如形如 121，1221，13531 的数字都是回文数，但 -121，10，25 等等都不是回文数。

#include <stdio.h>
int main() {
  int n, reversed = 0, remainder, original;
    printf("Enter an integer: ");
    scanf("%d", &n);
    original = n;

    // reversed integer is stored in reversed variable
    while (n != 0) {
        remainder = n % 10;
        reversed = reversed * 10 + remainder;
        n /= 10;
    }

    // palindrome if orignal and reversed are equal
    if (original == reversed)
        printf("%d is a palindrome.", original);
    else
        printf("%d is not a palindrome.", original);

    return 0;
}