Overloading Stream-Insertion and Stream-Extraction Operators

• $<<$ and $>>$
  • Already overloaded to process each built-in type
  • Can also process a user-defined class
• Example program
  • Class PhoneNumber; Holds a telephone number
  • Print out formatted number automatically; (123) 456-7890

The program of Figs. 1-2 demonstrates overloading the stream-extraction and stream-insertion operators to handle data of a user-defined telephone number class called PhoneNumber.

Figure 1: Overloaded stream-insertion and stream extraction operators. (part 1 of 2)

Figure 2: Overloaded stream-insertion and stream extraction operators. (part 2 of 2)