Implementing Operator Functions

The general format of the Operator function is:

return_type operator op ( argument list );

Where op is the symbol for the operator being overloaded. Op has to be a valid C++ operator, a new symbol cannot be used.

e.g.

Let us consider an example where we overload unary arithmetic operator '++'.

                class Counter

                 {

                  public :

                                                Counter();

                                                void operator++(void);

                  private :

                                                int Count;

      };

                Counter::Counter()

                 {

                                Count = 0;

                 }

                                void Counter::operator++(void)

                 {

                                ++ Count ;

                 }

                void main()

                 {

                   Counter c1;

                                c1++;                                     // increments Count to 1

                                ++c1;                                     // increments Count to 2

                 }