判断是否是回文数

/*回文数判断*/

#include <iostream>

#include <string>

using namespace std;



int main()

{

	string str;

	cin >> str;



	int backward = 0;

	int farward = str.size() - 1;



	for ( ; backward <= farward; backward++, farward--) {

		if (str[backward] != str[farward]) {

			break;

		}

	}



	if (backward > farward) {

		cout << "是回文数";

	} else {

		cout << "不是回文数";

	}





}