#include "phone_number.h"

#include <algorithm>
#include <ctype>

using namespace std;

phone_number::phone_number(const string &str)
{
    static const string invalid_number = "0000000000";
}

string phone_number::number() const
{
    return number_;
}

string phone_number::area_code() const
{
    return area_code_;
}

phone_number::operator string() const
{
    return number_;
}