палиндром

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

bool palindrom(string str)
{
    for (int i = 0; i<str.length() / 2; i++)
        if (str[i] != str[str.size() - 1 - i])
            return false;
    return true;
}

int main()
{
    string s, word;
    cout << "S = ";
    getline(cin, s);
    int k = 0;
    int i = 0;
    while (i<s.length())
    {
        if ((s[i]) >= 'a' && s[i] <= 'z')
        {
            word = "";
            while (i<s.length() &&((s[i]) >= 'a' && s[i] <= 'z'))
            {
                word.append(1,s[i]);
                ++i;
            }
            if (palindrom(word))
                k++;
        }
        else ++i;
    }
    cout << "kol-vo=" << k;
    system("pause");
    return 0;
}