#include <string>

class Email {
private:
    std::string mail;
public:
    // Constructor por default
    Email();

    // Constructor por copia
    Email(const Email& other);

    // Operador << (stdout)
    friend std::ostream& operator <<(std::ostream& o, const Email& email);

    // Operador >> (stdin)
    friend std::istream& operator >>(std::istream& i, Email& email);

    // Operador ==
    bool operator ==(const Email& other) const;

    // Operador =
    Email& operator =(const Email& other);

    // Operator int
    operator int() const;

};

std::istream& operator >>(std::istream& i, Email& email){
    i >> email.mail;
    return i;
}