14. operator= and copy constructor

• If you have a copy constructor, you should have an operator=

• Once you have operator=, a copy constructor is very simple:

  
      class Rational {
      public:
          Rational( Rational const& other );
          Rational& operator=( Rational const& other);
          //...
      };
  
      Rational::Rational( Rational const& other )
      {
          *this = other;
      }