Separating Interface from Implementation (see Figs 8-11)

• Separating interface from implementation
  • Advantage; Easier to modify programs
  • Disadvantage
    • Header files
    • Portions of implementation; Inline member functions
    • Hints about other implementation; private members
    • Can hide more with proxy class
• Header files
  • Class definitions and function prototypes
  • Included in each file using class; #include
  • File extension .h
• Source-code files
  • Member function definitions
  • Same base name; Convention
  • Compiled and linked

Figure 8: Time class definition

Figure 9: Time class member-function definitions (part 1 of 2).

Figure 10: Time class member-function definitions (part 2 of 2).

Figure 11: Program to test class Time.