поиск символа в строке

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

int main()
{
    int i = 0, count = 0;
    string s;
    getline(cin, s);
    while (s[i] != '\0')
    {
        if (s[i] == 'K' || s[i] == 'c') count++;
        i++;
    }
    cout << count << endl;
}