用string类型它不香吗？

#include<iostream>
using namespace std;
int main()
{
	string s;
	cin >> s;
	cout << s.length() << endl;
	for (int i = 0; i < s.length(); i++)
		cout << s[i] << (i == s.length() - 1 ? "\n" : " ");
	for (int i = s.length() - 1; i >= 0; i--)
		cout << s[i];
	return 0;
}