#include <string>
#include <iostream>
using namespace std;


bool is_palindrome(string);


int main()
{
  string s1 = "radar";
  string s2 = "abcd";
  cout<<"is "<<s1<<" palindrome? "<<is_palindrome(s1)<<endl;
  cout<<"is "<<s2<<" palindrome? "<<is_palindrome(s2)<<endl;
  return 0;
}


bool is_palindrome(string s)
{
  int len = s.length();
  for (int i=0; i<len/2; i++)
    if (s[i] != s[len-i-1])
      return false;
    else 
      return true;
}