Overloading Binary Operators

• Overloading binary operators
  • Non-static member function, one argument
  • Non-member function, two arguments
  • One argument must be class object or reference
• Upcoming example
  • If non-static member function, needs one argument
    • class String {
    • public:
    • const String &operator+=( const String & );
    • ...
    • };
  • y += z equivalent to y.operator+=( z )