#include "hamming.h"

#include <functional>
#include <numeric>
#include <stdexcept>
#include <string>

namespace hamming {

using namespace std;

int compute(const char *cstr1, const char *cstr2) {

    const string str1(cstr1);
    const string str2(cstr2);

    if (str1.size() != str2.size())
        throw domain_error("Strings have different length");

    return inner_product(str1.begin(), str1.end(), str2.begin(), 0,
            plus<int>(), not_equal_to<char>());
}

}